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# The recent discovery of a red oak tree sap that is

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21 Jul 2014, 19:38
A recently discovered red oak tree sap, which is anticipated to advance experimentation.

There is no noun after the modifier. I dont think D can be correct anyway.
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09 Aug 2014, 18:43
2
fluke wrote:
The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost.
(A) The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost
(B) The recent discovery of a red oak tree sap is anticipated to advance experimentation with natural substances in order to create cancer medicines and will be able to provide chemists with a more potent mixture to work from at a lower cost than the sap extracted from other trees
(C) The recent discovery of a red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from at a lower cost than other trees
(D) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from than the sap extracted from other trees can, and at a lower cost
(E) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide a more potent mixture to work from than other trees and to decrease the cost

Spoiler: :: OE
The original sentence is long and confusing. In order to simplify the sentence, let's figure out what it is trying to say: The main verb of the sentence is will be able. The subject appears to be The recent discovery of a red oak tree sap, but it is not logical that The recent discovery of sap... will be able to provide chemists with a more potent mixture because discoveries don't provide mixtures. What provides the mixture? The logical subject of the sentence is sap; we should look for the answer that places sap at the beginning of the sentence.

The comparison more...than does not compare like—or parallel—items; will be able to provide chemists with a more potent mixture to work from than other trees illogically compares the ability to provide chemists with a more potent mixture and other trees. Mixtures cannot be more potent than trees; it is the abilities of the mixtures and the abilities of the saps from other trees that are being compared.

Choice D is correct.
This choice changes the subject to A recently discovered red oak tree sap, which is the logical subject of the verb will be able to provide. This option also compares the ability of the recently discovered sap to provide chemists with a more potent mixture with the ability of the sap extracted from other trees by using the word can.

Choices B and C retain the incorrect subject, The recent discovery of a sap, which illogically seems to be able to provide chemists with a more potent mixture. These options also retain comparison errors. In B, the new trees are able to provide chemists with a more potent mixture....than other saps, and we want to compare the abilities of the saps. C makes the comparison to other trees. Both B and C are incorrect.

Choice E fixes the subject error but not the comparison error; the more potent mixture than other trees is illogical .

Choice D is correct.

The sentence compares “red oak tree sap” and “sap extracted from other trees” (two types of sap)

A) Compare “discovery” with “other trees”  Incorrect
B) Compare “discovery” with “sap extracted from other trees”  Incorrect
C) Compare “discovery” with “other trees”  Incorrect
D) Correctly compare “red oak tree sap” and “sap extracted from other trees”  Correct.
E) Compare “red oak tree sap” and “other trees”  Incorrect

Hope it helps.
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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09 Aug 2014, 19:29
PiyushK wrote:
According to Ron while making comparison we should take care of verb parallelism governed by following rules :

1 * if you have than/as + subject + FORM OF "TO BE" as the second half of a comparison, then you must have another form of "to be" in the first half of the comparison.

2 * if you have than/as + subject + HELPING VERB as the second half of a comparison, then you must have the SAME helping verb (perhaps in a different tense) in the first half of the comparison.

3 * if you have than/as + subject + FORM OF "TO DO" as the second half of a comparison, then you must have an ACTION VERB (or another form of "to do") in the first half of the comparison.

But in option D.

will be able (to be) ... than ... can (model auxiliary verb)

These verbs are not parallel thus elliptical construction is not valid in D.

Be able to is not a modal auxiliary verb. in place of be able to we often use "can" and "could", which are modal auxiliary verbs.

Although B is the best choice so far, but I am concerned about parallelism as mentioned above.

Kindly share your understanding on this.

Thanks.

Very good point, but in this sentence the elliptical construction is :
will be able to provide ... than ... can be able to provide

And you know that will and can are both Auxiliary verbs
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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25 Nov 2014, 05:16
Option D positioned 'can' awkwardly. "X will be able to provide more....than y" sounds good
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12 Feb 2015, 23:35
The OA is given as D but my understanding is that "and" should generally connect two similar entities whereas in D it is connecting a complete sentence with a phrase. Also, a comma before "and" indicates that there should be a complete clause after "and".

Would request experts to guide me if what I understood is wrong. Thanks in advance.
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12 May 2015, 06:19
Not a great Q,but (B) is definitely not correct -

The recent discovery of a red oak tree sap is anticipated to advance experimentation with natural substances in order to create cancer medicines and will be able to provide chemists with a more potent mixture to work from at a lower cost than the sap extracted from other trees

It is not the discovery,but the red oak tree sap that will be will be able to provide chemists with a more potent mixture to work. B says It is the discovery (wrong subject).

This question is "heavily inspired" from OG question here -

the-development-of-a-new-jumbo-rocket-that-is-expected-to-130217.html
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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31 May 2015, 06:48
The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost.
(A) The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost
(B) The recent discovery of a red oak tree sap is anticipated to advance experimentation with natural substances in order to create cancer medicines and will be able to provide chemists with a more potent mixture to work from at a lower cost than the sap extracted from other trees
(C) The recent discovery of a red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from at a lower cost than other trees
(D) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from than the sap extracted from other trees can, and at a lower cost
(E) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide a more potent mixture to work from than other trees and to decrease the cost

I think all of us agree that A,C & E doesn't do a correct comparison,hence are incorrect choices. That leaves us with B & D. If you check D, it says.. the Sap....will be able to provide the chemist with..... This is totally incorrect ..The tree sap cant provide itself to scientist for doing something... On the contrary .. in B.. it says the discovery of the tree sap will be able to provide them something.... This makes sense.... hence B is the correct answer..
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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04 Jul 2015, 04:06
Only B and D make somewhat sense to me...
After POE, B is out as in B it seems that the discovery will be able to provide chemists... which is wrong to the ear

But in D, it clearly says that red oak tree will provide... and which makes correct sense.
+1 D
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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04 Nov 2015, 21:31
My opinion below , based on what I learnt.

D &E can be eliminated ...'Which' is used when we are relating to something , already defined /Known/Described. The sentence in D,E begins with the article 'A' and not 'the',
which necessarily means that 'which' should not be used.Moreover the use of comma is unnecessary

Option 'C' does use the 'Which' correctly because the sentence is starting with article 'The'... But the comparison towards the end of this sentence is not clear "a more potent mixture to work from at a lower cost than other trees "

Option B.. seems to be the best fit...(though it changes a relative pronoun modifier , to a verb )
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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05 Nov 2015, 14:40
The tree is the object of the sentence, not the discovery. That is why D is correct.
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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05 Nov 2015, 19:22
woah..tough one..took me 3+ minutes to reach the answer.
by looking closely, we can identify that we need to compare tree saps. A discovery cannot provide with materials, while a tree sap can.
Just by looking at the first part, we can eliminate A, B, and C.

Second, the comparison is between red oak tree sap and saps of other trees.
Comparison is "more than".
A has an ambiguous comparison.
B clearly does not use the correct comparison idiom "more than"
C again ambiguous comparison. Will it provide more smth than trees or provide smth more than trees provide?
D looks good.
E - chemists are eliminated. whom will the red oak tree provide with materials? To decrease the cost - what does this refer to? what costs?

Went with D.
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07 Nov 2015, 02:10
I will only discuss choice B and D. Choice B is FLAWED in meaning. Choice D is not so much a problem of parallelism.

Let's breaking down the initial statement:
The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost.

- The recent discovery of a red oak tree sap [that is anticipated to advance experimentation with natural substances in order to create cancer medicines] will be able to...
Question: What will be able to?
Answer: The recent discovery of a red oak tree sap.

- .... will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost.
Question: The sentence compares what?
Answer: It is comparing the discovery (...able to provide chemists with a more potent mixture....) THAN other trees???

Such flaw in meaning eliminates B also.
(B) The recent discovery of [a red oak tree sap] is anticipated to advance experimentation with natural substances in order to create cancer medicines and will be able to provide chemists with a more potent mixture to work from at a lower cost than the sap extracted from other trees

The valid comparison should be between the sap of the recently discovered red oak tree and the sap of the other trees. Answer D tackles this problem.

(D) A recently discovered red oak tree sap, [which is anticipated to advance experimentation with natural substances in order to create cancer medicines], will be able to provide chemists with a more potent mixture to work from THAN the sap extracted from other trees can, and at a lower cost

It is clear that the new discovered red oak tree sap itself (in B, it seems that the discovery provides chemist with that sap) provides chemist with a more potent mixture to work from THAN the sap extracted from other tress does.

Ambiguity in meaning is solved.

As for the parallelism:

Indeed "can" does NOT make a perfect parallelism with "will be able to". However, considering all other answer choices, D is the best possible.

Sincerely,
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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08 Nov 2015, 08:49
In A and D, the parallelism marker ‘and’ is joined by the prepositional phrase ‘at a lower cost’ on the right side. What is the other parallel element on the left of ‘and’?
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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08 Nov 2015, 08:58
Quote:
D. A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from than the sap extracted from other trees can, and at a lower cost

Why is the comma there before and, when there are only two elements involved? Logically therefore, should the 'and' and the comma before be removed to make D problem free?
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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08 Nov 2015, 09:16
I have a doubt in option C...though its not exactly going to affect the selection process. I want to know the noun modifier 'which....' refers to whether discovery or the red oak tree sap?
I really get stumped in other questions with this sort of comparision.
prasun9 wrote:
fluke wrote:
The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost.
(A) The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost
(B) The recent discovery of a red oak tree sap is anticipated to advance experimentation with natural substances in order to create cancer medicines and will be able to provide chemists with a more potent mixture to work from at a lower cost than the sap extracted from other trees
(C) The recent discovery of a red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from at a lower cost than other trees
(D) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from than the sap extracted from other trees can, and at a lower cost
(E) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide a more potent mixture to work from than other trees and to decrease the cost

Spoiler: :: OE
The original sentence is long and confusing. In order to simplify the sentence, let's figure out what it is trying to say: The main verb of the sentence is will be able. The subject appears to be The recent discovery of a red oak tree sap, but it is not logical that The recent discovery of sap... will be able to provide chemists with a more potent mixture because discoveries don't provide mixtures. What provides the mixture? The logical subject of the sentence is sap; we should look for the answer that places sap at the beginning of the sentence.

The comparison more...than does not compare like—or parallel—items; will be able to provide chemists with a more potent mixture to work from than other trees illogically compares the ability to provide chemists with a more potent mixture and other trees. Mixtures cannot be more potent than trees; it is the abilities of the mixtures and the abilities of the saps from other trees that are being compared.

Choice D is correct.
This choice changes the subject to A recently discovered red oak tree sap, which is the logical subject of the verb will be able to provide. This option also compares the ability of the recently discovered sap to provide chemists with a more potent mixture with the ability of the sap extracted from other trees by using the word can.

Choices B and C retain the incorrect subject, The recent discovery of a sap, which illogically seems to be able to provide chemists with a more potent mixture. These options also retain comparison errors. In B, the new trees are able to provide chemists with a more potent mixture....than other saps, and we want to compare the abilities of the saps. C makes the comparison to other trees. Both B and C are incorrect.

Choice E fixes the subject error but not the comparison error; the more potent mixture than other trees is illogical .

Choice D is correct.

If we simplify the original sentence then it becomes
The recent discovery of ... will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost.

Now there are 2 problems in this sentence. Remember of is a middle-man and it doesn't change the subject of the sentence.
1. The recent discovery will be able to provide chemists with a more potent mixture to work from.
Discovery itself cannot provide chemists with a mixture, so the subject must be The Red Oak Tree Sap.

2. The recent discovery will be able to provide chemists with a more potent mixture to work from than other trees
Here recent discovery is compared with other trees, which is illogical.

So the correct answer must fix both these problems.

Option B doesn't fix any of the issues as the subject is still "The recent discovery"
Option C doesn't fix any of the issues as the subject is still "The recent discovery"

Option D fixes both the problems by making red oak tree sap the subject of the sentence and correcting the comparison.
A recently discovered red oak tree sap, <modifier>, will be able to provide chemists with a more potent mixture to work from than the sap extracted from other trees can, and at a lower cost
- Correctly states that the Red oak tree sap will be able to provide chemists with a more potent mixture
- Also correctly compares Sap with Sap. Red oak tree sap provides a more potent mixture than the sap extracted from other trees can.

Option E corrects the 1st issue but leaves the comparison issue as it is. It compares Sap with other Trees
A recently discovered red oak tree sap, <modifier>, will be able to provide a more potent mixture to work from than other trees and to decrease the cost

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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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08 Nov 2015, 14:51
A) Cancer medicine will be able to…and at a lower cost is not parallel
B) The recent discovery is compared to the sap extracted from other trees
C) Same error as B
E) Than other trees and to decrease the cost is not parrallel
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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08 Nov 2015, 15:59
Alok322 wrote:
I have a doubt in option C...though its not exactly going to affect the selection process. I want to know the noun modifier 'which....' refers to whether discovery or the red oak tree sap?
I really get stumped in other questions with this sort of comparision.
prasun9 wrote:
fluke wrote:
The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost.
(A) The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost
(B) The recent discovery of a red oak tree sap is anticipated to advance experimentation with natural substances in order to create cancer medicines and will be able to provide chemists with a more potent mixture to work from at a lower cost than the sap extracted from other trees
(C) The recent discovery of a red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from at a lower cost than other trees
(D) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from than the sap extracted from other trees can, and at a lower cost
(E) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide a more potent mixture to work from than other trees and to decrease the cost

Spoiler: :: OE
The original sentence is long and confusing. In order to simplify the sentence, let's figure out what it is trying to say: The main verb of the sentence is will be able. The subject appears to be The recent discovery of a red oak tree sap, but it is not logical that The recent discovery of sap... will be able to provide chemists with a more potent mixture because discoveries don't provide mixtures. What provides the mixture? The logical subject of the sentence is sap; we should look for the answer that places sap at the beginning of the sentence.

The comparison more...than does not compare like—or parallel—items; will be able to provide chemists with a more potent mixture to work from than other trees illogically compares the ability to provide chemists with a more potent mixture and other trees. Mixtures cannot be more potent than trees; it is the abilities of the mixtures and the abilities of the saps from other trees that are being compared.

Choice D is correct.
This choice changes the subject to A recently discovered red oak tree sap, which is the logical subject of the verb will be able to provide. This option also compares the ability of the recently discovered sap to provide chemists with a more potent mixture with the ability of the sap extracted from other trees by using the word can.

Choices B and C retain the incorrect subject, The recent discovery of a sap, which illogically seems to be able to provide chemists with a more potent mixture. These options also retain comparison errors. In B, the new trees are able to provide chemists with a more potent mixture....than other saps, and we want to compare the abilities of the saps. C makes the comparison to other trees. Both B and C are incorrect.

Choice E fixes the subject error but not the comparison error; the more potent mixture than other trees is illogical .

Choice D is correct.

If we simplify the original sentence then it becomes
The recent discovery of ... will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost.

Now there are 2 problems in this sentence. Remember of is a middle-man and it doesn't change the subject of the sentence.
1. The recent discovery will be able to provide chemists with a more potent mixture to work from.
Discovery itself cannot provide chemists with a mixture, so the subject must be The Red Oak Tree Sap.

2. The recent discovery will be able to provide chemists with a more potent mixture to work from than other trees
Here recent discovery is compared with other trees, which is illogical.

So the correct answer must fix both these problems.

Option B doesn't fix any of the issues as the subject is still "The recent discovery"
Option C doesn't fix any of the issues as the subject is still "The recent discovery"

Option D fixes both the problems by making red oak tree sap the subject of the sentence and correcting the comparison.
A recently discovered red oak tree sap, <modifier>, will be able to provide chemists with a more potent mixture to work from than the sap extracted from other trees can, and at a lower cost
- Correctly states that the Red oak tree sap will be able to provide chemists with a more potent mixture
- Also correctly compares Sap with Sap. Red oak tree sap provides a more potent mixture than the sap extracted from other trees can.

Option E corrects the 1st issue but leaves the comparison issue as it is. It compares Sap with other Trees
A recently discovered red oak tree sap, <modifier>, will be able to provide a more potent mixture to work from than other trees and to decrease the cost

While the modifier "which" always modifies what directly precedes it, "the recent discovery of a red oak tree sap" is all one subject. Therefore, the which would refer to the discovery, not the tree sap. However, "a recently discovered red oak tree sap" changes the subject to be the sap itself, not the discovery. In this instance, the "which" refers to the sap, not the discovery.

Does this help?
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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08 Jan 2016, 16:46
I was surprised so many others got this wrong. By focusing on the splits, I was able to find the errors quite easily. If you are able to find the modifier error, that eliminates the first three answer choices. From there, D and E are moderately difficult to eliminate depending on how you see "to decrease the cost".

The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost.

(A) The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost
It's not the discovery of the red oak tree sap that is anticipated to advance the experimentation. It's the actual red oak tree sap.

(B) The recent discovery of a red oak tree sap is anticipated to advance experimentation with natural substances in order to create cancer medicines and will be able to provide chemists with a more potent mixture to work from at a lower cost than the sap extracted from other trees
It's not the discovery of the red oak tree sap that is anticipated to advance the experimentation. It's the actual red oak tree sap.

(C) The recent discovery of a red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from at a lower cost than other trees
It's not the discovery of the red oak tree sap that is anticipated to advance the experimentation. It's the actual red oak tree sap.

(D) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from than the sap extracted from other trees can, and at a lower cost
Correct. The red oak tree sap is the noun being modified to advance the experimentation. This makes logical sense. At a lower cost is also correct.

(E) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide a more potent mixture to work from than other trees and to decrease the cost
"to decrease the cost" needs to have a clause after it in order to maintain the parallelism. Here, it sounds awkward when compared with "to provide a more potent mixture to work from than other trees"
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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25 May 2016, 02:23
The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost.
(A) The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost. :- Too long no punctuation, its a classic anti jumbler

(B) The recent discovery of a red oak tree sap is anticipated to advance experimentation with natural substances in order to create cancer medicines and will be able to provide chemists with a more potent mixture to work from at a lower cost than the sap extracted from other trees. The recent discovery of a red oak tree sap is anticipated & will be able to provide?? what does that mean.

(C) The recent discovery of a red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from at a lower cost than other trees. Now Which refers to Oak Tree Sap , hence OTS is anticipated to advance experimentation??? Seems illogical to me, and comma will be able to provide makes the same mistake as B

(D) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from than the sap extracted from other trees can, and at a lower cost.
This is the most sane of all till now, recently Adverb modifies ROTS, which is anticipated to advance Experimentation? wait isnt this the reason i eliminated the other two? MF okay lets go ahead anyways, Oh The IDIOM PROVIDE WITH, this was not in any of the others, and its a correct idiom, carry on, With a more potent mix and at a lower cost, very clear and very parallel. If E is not better i go with this.

(E) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide a more potent mixture to work from than other trees and to decrease the cost.

Adverb modifier okay, Which clause seems to be very popular here so dont pay attention, provide whom??? who is working here chemists are eliminated. And to decrease cost is again very non clear.

Thats how i got to D.

Please guide me if any mathematical or surgical way to tackle such Questions.
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Re: The recent discovery of a red oak tree sap that is  [#permalink]

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19 Jul 2018, 16:53
mikemcgarry

prasun9 wrote:
fluke wrote:
The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost.
(A) The recent discovery of a red oak tree sap that is anticipated to advance experimentation with natural substances in order to create cancer medicines will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost
(B) The recent discovery of a red oak tree sap is anticipated to advance experimentation with natural substances in order to create cancer medicines and will be able to provide chemists with a more potent mixture to work from at a lower cost than the sap extracted from other trees
(C) The recent discovery of a red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from at a lower cost than other trees
(D) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide chemists with a more potent mixture to work from than the sap extracted from other trees can, and at a lower cost
(E) A recently discovered red oak tree sap, which is anticipated to advance experimentation with natural substances in order to create cancer medicines, will be able to provide a more potent mixture to work from than other trees and to decrease the cost

Spoiler: :: OE
The original sentence is long and confusing. In order to simplify the sentence, let's figure out what it is trying to say: The main verb of the sentence is will be able. The subject appears to be The recent discovery of a red oak tree sap, but it is not logical that The recent discovery of sap... will be able to provide chemists with a more potent mixture because discoveries don't provide mixtures. What provides the mixture? The logical subject of the sentence is sap; we should look for the answer that places sap at the beginning of the sentence.

The comparison more...than does not compare like—or parallel—items; will be able to provide chemists with a more potent mixture to work from than other trees illogically compares the ability to provide chemists with a more potent mixture and other trees. Mixtures cannot be more potent than trees; it is the abilities of the mixtures and the abilities of the saps from other trees that are being compared.

Choice D is correct.
This choice changes the subject to A recently discovered red oak tree sap, which is the logical subject of the verb will be able to provide. This option also compares the ability of the recently discovered sap to provide chemists with a more potent mixture with the ability of the sap extracted from other trees by using the word can.

Choices B and C retain the incorrect subject, The recent discovery of a sap, which illogically seems to be able to provide chemists with a more potent mixture. These options also retain comparison errors. In B, the new trees are able to provide chemists with a more potent mixture....than other saps, and we want to compare the abilities of the saps. C makes the comparison to other trees. Both B and C are incorrect.

Choice E fixes the subject error but not the comparison error; the more potent mixture than other trees is illogical .

Choice D is correct.

If we simplify the original sentence then it becomes
The recent discovery of ... will be able to provide chemists with a more potent mixture to work from than other trees and at a lower cost.

Now there are 2 problems in this sentence. Remember of is a middle-man and it doesn't change the subject of the sentence.
1. The recent discovery will be able to provide chemists with a more potent mixture to work from.
Discovery itself cannot provide chemists with a mixture, so the subject must be The Red Oak Tree Sap.

2. The recent discovery will be able to provide chemists with a more potent mixture to work from than other trees
Here recent discovery is compared with other trees, which is illogical.

So the correct answer must fix both these problems.

Option B doesn't fix any of the issues as the subject is still "The recent discovery"
Option C doesn't fix any of the issues as the subject is still "The recent discovery"

Option D fixes both the problems by making red oak tree sap the subject of the sentence and correcting the comparison.
A recently discovered red oak tree sap, <modifier>, will be able to provide chemists with a more potent mixture to work from than the sap extracted from other trees can, and at a lower cost
- Correctly states that the Red oak tree sap will be able to provide chemists with a more potent mixture
- Also correctly compares Sap with Sap. Red oak tree sap provides a more potent mixture than the sap extracted from other trees can.

Option E corrects the 1st issue but leaves the comparison issue as it is. It compares Sap with other Trees
A recently discovered red oak tree sap, <modifier>, will be able to provide a more potent mixture to work from than other trees and to decrease the cost
Re: The recent discovery of a red oak tree sap that is &nbs [#permalink] 19 Jul 2018, 16:53

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