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505-555 Level|   Parallelism|                  
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Quote:
In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing and fungus was growing on the walls.
A. due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing
B. due to moisture that tourists had exhaled, thereby raising its humidity to such levels that salt from the stone would crystallize
C. because tourists were exhaling moisture, which had raised the humidity within them to levels such that salt from the stone would crystallize
D. because of moisture that was exhaled by tourists raising the humidity within them to levels so high as to make the salt from the stone crystallize
E. because moisture exhaled by tourists had raised the humidity within them to such levels that salt from the stone was crystallizing

OA:

My question:

As per the OG explanation, 'them' in C and D seems to refer to 'tourists', but in E 'them' clearly refers to chambers.
Can someone please explain the concept of the pronoun reference in this case?

What I understood is that:
in the case of E tourists is the noun in the modifier 'exhaled by tourists'. So, 'tourists' loose the significance as it is out of scope for the remaining main sentence/clause. But is is the right creteria to reject the pronoun reference to noun 'tourists'.

PS: I know why the OA mentioned is correct, but need clarification on the above concept of pronoun reference.

I wonder what you mean by saying tourists loose the significance as it is out of scope

coming back to the pronoun reference issue -- I think the reason THEM refers to tourists in C and D and not in E
is that in C and D there is an intervening Clause which introduces TOURISTS in such a way that it can act as a more proximate antecedent (than chambers); recall that a pronoun refers to the nearest logical antecedent

In C -- it says -- Tourists WERE exhaling moisture ---- hence TOURISTS can act as a subject in its own right.

In D -- it says -- because of moisture that was exhaled by tourists -- again here even though the subject of the relative clause introduced by THAT is MOISTURE yet THEM cannot refer to moisture but instead refers to the predicate of the clause (Tourists) in this case.

In E if you notice because moisture exhaled by tourists cannot position tourist as a likely antecedent (because 'tourists' is part of a phrase and hence cannot stand on its own as a subject).

I am not sure if I was able to explain. Let me know if you need further explanation and I will try to explain again.

To be sure --- C and D have other problems which made eliminating them a lot easier -- to the extent that I had missed the pronoun reference entirely -- until you pointed it out.

Regards
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dwivedys
I wonder what you mean by saying tourists loose the significance as it is out of scope
I was thinking in the similar lines of your explanation of E.
dwivedys
coming back to the pronoun reference issue -- I think the reason THEM refers to tourists in C and D and not in E
is that in C and D there is an intervening Clause which introduces TOURISTS in such a way that it can act as a more proximate antecedent (than chambers); recall that a pronoun refers to the nearest logical antecedent
Agree..!
dwivedys
In C -- it says -- Tourists WERE exhaling moisture ---- hence TOURISTS can act as a subject in its own right.
This is fine.
dwivedys
In D -- it says -- because of moisture that was exhaled by tourists -- again here even though the subject of the relative clause introduced by THAT is MOISTURE yet THEM cannot refer to moisture but instead refers to the predicate of the clause (Tourists) in this case.
In this case,

In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair because of moisture that was exhaled by tourists raising the humidity within them to levels so high as to make the salt from the stone crystallize and fungus was growing on the walls.

Lets cut it short.

the chambers [strike]inside the pyramid of the Pharaoh Menkaure at Giza[/strike] were closed to visitors [strike]for cleaning and repair[/strike] because of moisture that was exhaled by tourists raising the humidity within them [strike]to levels so high as to make the salt from the stone crystallize and fungus was growing on the walls.[/strike]

the chambers were closed to visitors because of moisture that was exhaled by tourists raising the humidity within them.

this sentence can be broken down in 2 ways:

i) the chambers were closed to visitors because of moisture (that was exhaled by tourists) raising the humidity within them.

ii) the chambers were closed to visitors because of moisture (that was exhaled by tourists raising the humidity within them).
Is it correct? In this case 'raising the humidiy...' is modifying the tourists not the noun phrase "moisture...tourists".
in (ii) 'them' seems to refer to tourists.

can this be the reason.
dwivedys
In E if you notice because moisture exhaled by tourists cannot position tourist as a likely antecedent (because 'tourists' is part of a phrase and hence cannot stand on its own as a subject).

So does that mean if we have noun in the phrase modifier in the main clause, pronoun shouldn't refer back to it?

So is the below sentence incorrect?
"Book X written by John is not his best work."
dwivedys
I am not sure if I was able to explain. Let me know if you need further explanation and I will try to explain again.

To be sure --- C and D have other problems which made eliminating them a lot easier -- to the extent that I had missed the pronoun reference entirely -- until you pointed it out.

I too look into the pronoun issue only after looking the explanation.
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Let us take the idiom route to solve this. ‘Such levels that’ is the right idiom and you have that in B and E only. Between B and E, B is too awkward for using wrong reasons such as the chambers being closed due to moisture rather than due to the raised levels of humidity and for using the future modal ‘would crystallize’. E is the choice by POE. I took the pronoun ‘them’ in its stride to mean the chambers.
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The answer choice I picked was E:

A. There are a few problems I noticed in this answer choice. Firstly, the pronoun "its" refers back to chambers, but chambers is plural. Therefore, there is a problem with the number of the pronoun. I also did not like the use of "which" as a modifier here because it seems to modify tourists and not the phrase "moisture exhaled by tourists." Finally, the word "so" is unnecessary.

B. The first problem I noticed was "had exhaled." The use of past perfect tense is not needed when simple past would be perfectly sufficient. Also, "would crystallize" is not parallel to the last phrase.

C. "Would crystallize" is not parallel to the last phrase.

D. Again the last phrases are not parallel.

Therefore, I am left with the answer choice E.

In choice C and D, the word "them" is separated from tourists and chambers by a clause. Therefore, I thought this pronoun was ambiguous. If you notice in choice E, it makes logical sense that "them" can only refer to chambers.
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Quote:
I understand why A,B and D are out. Can you use one of the 10 core frameworks to explain C vs E?


Look at X&Y consistency when you see the keyword "and" after the underlined portion.

You notice the second half says "...and fungus was growing on the walls"

So whatever is to the left of the word "and" needs to be consistent.

Between (C) and (E) - which would you choose?

(C): "..such that salt from the stone would crystallize"

(E): "..to such levels that salt from the stone was crystallizing"

Between the two, we need (E) so we get:

"[X] was crystallizing and [y] was growing"

So as you can see, this is simply an X&Y consistency question.

We've also posted a video solution to this question here: https://www.gmatpill.com/gmat-practice-t ... /(OG12-006)%20(OG13-008)%20-%20Pyramid%20Chambers/question/1844
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In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing and fungus was growing on the walls.

a. due to moisture exhaled by tourists, which rised its humidity to such levels so that salt from the stone was crystallizing
b. due to moisture that tourists had exhaled, thereby raising its humidity to such levels that salt from the stone would crystallize
c. because tourists were exhaling moisture, which had raised the humidity within them to levels such that salt from the stone would crystallize
d. because of moisture that was exhaled by tourists raising the humidity within them them to levels so high as to make the salt from the stone crystallize
e. because moisture exhaled by tourists had raised the humidity within them to such levels that salt from the stone was crystallizing

Doubt 1:
In OE for options C and D, it is mentioned that "them" in C and D seems to refer to tourists. But OE for E says that "them" in E clearly talks about chambers.
My understanding for this is as below reasons can you please confirm if my analysis is correct ?

In E : "exhaled by tourists" is a modifier that is modifying moisture and so the sentence "moisture had raised the humidity within them" is the sentence and so it is more clear that "them" refers to chambers.

In D: "tourists raising the humidity within them" "raising the humidity with in them" modifies "tourists". Hence, it looks like "them" refers to "tourists".

Not sure of the case with C.

Doubt 2:
In option A, idiom "such levels so that" is used. Is this correctly used ?

Doubt 3:
It is mentioned that "due to" is used imprecisely to express causal relation. Can you please eloborate on how "due to" can be used effectively to express these relations?
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dc1509
In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing and fungus was growing on the walls.

a. due to moisture exhaled by tourists, which rised its humidity to such levels so that salt from the stone was crystallizing
b. due to moisture that tourists had exhaled, thereby raising its humidity to such levels that salt from the stone would crystallize
c. because tourists were exhaling moisture, which had raised the humidity within them to levels such that salt from the stone would crystallize
d. because of moisture that was exhaled by tourists raising the humidity within them them to levels so high as to make the salt from the stone crystallize
e. because moisture exhaled by tourists had raised the humidity with them to such levels that salt from the stone was crystallizing

Doubt 1:
In OE for options C and D, it is mentioned that "them" in C and D seems to refer to tourists. But OE for E says that "them" in E clearly talks about chambers.
My understanding for this is as below reasons can you please confirm if my analysis is correct ?

In E : "exhaled by tourists" is a modifier that is modifying moisture and so the sentence "moisture had raised the humidity within them" is the sentence and so it is more clear that "them" refers to chambers.

In D: "tourists raising the humidity within them" "raising the humidity with in them" modifies "tourists". Hence, it looks like "them" refers to "tourists".

Not sure of the case with C.

Doubt 2:
In option A, idiom "such levels so that" is used. Is this correctly used ?

Doubt 3:
It is mentioned that "due to" is used imprecisely to express causal relation. Can you please eloborate on how "due to" can be used effectively to express these relations?

Your understanding for D and E seems to be correct. But I would like to add one point here. Its not the proximity which defines the pronoun referrent but the subject of the sentence. In E, there is only one clause and that itself has "chambers" as the subject. Whereas in D, the relative clause starting with "that" contains "tourists" as the subject.
This is the reason for ambiguity and hence incorrect.

Option C is a total disaster in that :
i) because + verb-ing form is incorrect on GMAT
ii) "them" may refer to "tourists".
iii) usage of "such that" implies intention, nowhere mentioned in the intended meaning. Hence incorrect.

Doubt 2: "such levels so that"- incorrect because of two issues:
i) such levels implies that we have already talked about some levels and here mean to refer to those levels only, but nowhere we have talked about some levels.
ii) so that implies intention, which is incorrect here.

Doubt 3: Yes "due to" is used to show a causal relation. Whenever you see "due to" just replace it with "caused by" and then analyze whether there is any causal relation or not. If there is then "due to" is fine.

Hope that helps.
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dc1509
In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing and fungus was growing on the walls.

a. due to moisture exhaled by tourists, which rised its humidity to such levels so that salt from the stone was crystallizing
b. due to moisture that tourists had exhaled, thereby raising its humidity to such levels that salt from the stone would crystallize
c. because tourists were exhaling moisture, which had raised the humidity within them to levels such that salt from the stone would crystallize
d. because of moisture that was exhaled by tourists raising the humidity within them them to levels so high as to make the salt from the stone crystallize
e. because moisture exhaled by tourists had raised the humidity with them to such levels that salt from the stone was crystallizing

Doubt 1:
In OE for options C and D, it is mentioned that "them" in C and D seems to refer to tourists. But OE for E says that "them" in E clearly talks about chambers.
My understanding for this is as below reasons can you please confirm if my analysis is correct ?

In E : "exhaled by tourists" is a modifier that is modifying moisture and so the sentence "moisture had raised the humidity within them" is the sentence and so it is more clear that "them" refers to chambers.

In D: "tourists raising the humidity within them" "raising the humidity with in them" modifies "tourists". Hence, it looks like "them" refers to "tourists".

Not sure of the case with C.

Doubt 2:
In option A, idiom "such levels so that" is used. Is this correctly used ?

Doubt 3:
It is mentioned that "due to" is used imprecisely to express causal relation. Can you please eloborate on how "due to" can be used effectively to express these relations?


You analysis is fine. I agree with Marcab above that pronoun usage here is based on the sentence construction (tourist (subject of the clause) ....and hence the pronoun 'them' refers back to 'tourists' and not chambers and you can check if replacing 'due to' with 'caused by' still makes sense

more about due to VS because--- Due to modifies Nouns only and Because modifies Clauses. Due to will show direct causal relation to the Noun

eg-- From the helicopter, I saw a 6-mile long traffic jam, due to an overturned truck --'due to' modifies noun JAM caused directly by the overturned truck.

eg--I came late to the meeting, due to the traffic --The usage is INCORRECT since 'due to' modifies noun Meeting and the traffic does not cause the meeting (not a direct causal relation)
to correct it we will use because.
I came late to the meeting, because of the traffic. Here Because modifies the entire previous clause 'I came late to the meeting'

HTH
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A series of doubts have been raised and answered on this episode. If have that much of time to think about, well you can and should go through this kind of algorithm. However, for those who may not be unfortunate to afford that luxury, here is a short- cut via grammar. As per the tenets of Parallelism, what form follows after -and -, should be there before- and - also, especially when the second arm is un-underlined. In this context, the text says in the second part -- and fungus was growing on the walls. – To go in tandem with this past progressive tense after - and- , we should have yet another past progressive tense before the –and-. You might see only A and E have such //ism.
In A, such levels so that is bad idiom; such levels that is the right idiom. So, E is the choice.
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In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing and fungus was growing on the walls.

(A) due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing
(B) due to moisture that tourists had exhaled,thereby raising its humidity to such levels that salt from the stone would crystallize
(C) because tourists were exhaling moisture, which had raised the humidity within them to levels such that salt from the stone would crystallize
(D) because of moisture that was exhaled by tourists raising the humidity within them to levels so high as to make the salt from the stone crystallize
(E) because moisture exhaled by tourists had raised the humidity within them to such levels that salt from the stone was crystallizing

whenever you see parallel marker "and" always check if in current context is there any list? if yes...then you have to maintain symmetry to the both side of and...and this is what we have to do here!!
1.right side of "and" is ---> fungus was growing
2. hence left side of "and" should be ----> was crystallizing

thus we left with only two choices A & E
in Option A,Modifier its is not a correct usage since "its"(singular) is trying to refer "tourists" (plural)

so E is the correct choice..
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Immediately notice two forms to begin the phrase: "due to moisture..." and "because..."

A) sounds generally right. But upon reading the comma ", which" - we see that the "which" phrase should describe the word immediately next to the comma. The way the sentence is structured, the phrase after "which" is describing "tourists" when it really should be describing "moisture". How do we know that? Clearly the phrase is talking about raising humidity levels - it's the moisture that is doing this not the tourists.

So A) is out.

C) has the comma next to "which" but somehow putting the blame on tourists directly sounded weird to me. So I went on to D and E.

D) "because of moisture" - sounded weird off the bat. Sentence would have been fine as "because of moisture" and ended it there. But adding a bunch of phrases after that doesn't make the sentence sensible.

E) "Because moisture.." blah blah blah
You can cut the fluff to see if the sentence makes sense
"because moisture [ ] had raised the humidity within them [presumably the chambers inside the pyramid] to such levels that...."

Looks okay.
Quick check on (B) shows that this sentence is getting too long. It's supposed to end a sentence, but extends it with ", thereby..." Sentence is too long and (E) works out better.
"Its" is actually ok here and not what you should be focusing on for this question
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I saw the explanation in OG and they said that (D) is wrong because them refer to tourists.

While (E) is correct and them is understood as "chambers".

Can anyone show me the difference of these two options?
Let us look at E. The clause we are talking about is:

Moisture exhaled by tourists had raised the humidity within them

If them in any way had to refer to tourists, then the sentence would have used the reflexive pronoun themselves.

For example, which of the following would you say:

i) The phenomenal GMAT score made thuylinh proud of her.

Or

ii) The phenomenal GMAT score made thuylinh proud of herself.

Clearly if thuylinh is proud that she scored phenomenally on GMAT, then the usage has to be herself.

In D however, the clause is:

that was exhaled by tourists

So, them is outside this clause and hence, has multiple antecedents.

Having said this, pronoun ambiguity should not be your first reason to disregard an answer choice. As others have already mentioned, there are several other more apparent reasons why D is not correct.
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sudeep
As per the OG explanation, 'them' in C and D seems to refer to 'tourists', but in E 'them' clearly refers to chambers.
Can someone please explain the concept of the pronoun reference in this case?

PS: I know why the OA mentioned is correct, but need clarification on the above concept of pronoun reference[/b].

Still no answer has been found for this question, in bold?!
This has to do with bit of a logical reasoning. In C, D and E, let's identify the clause that tourists is a part of:

C. because tourists were exhaling moisture (verb is were)
D. that was exhaled by tourists (verb is was)
E. moisture exhaled by tourists had raised the humidity within them (verb is had)

Notice that them is a part of the same clause as tourists is, only in E. Now here is the thing. When an object pronoun (such as them in this case) is used, it can never refer to a noun in the same clause. This is just a logical reasoning thing. Let's take an example.

Suppose Peter scored exceptionally well and was proud of his marks. Would we say:

i) After scoring well, Peter was proud of him.

Or

ii) After scoring well, Peter was proud of himself.

Clearly ii). him (object pronoun) cannot be used to refer to Peter (noun in the same clause).

Similarly, in the sentence under consideration, in option E, him (object pronoun) cannot be used to refer to tourists (noun in the same clause).
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In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing and fungus was growing on the walls.

"for cleaning and repair.." Is this phrase parallel? gerund and verb?


because moisture exhaled by tourists had raised the humidity within them to such levels that salt from the stone was crystallizing

Isn't the use of 'them' is somewhat ambiguous? As if it's referrin to tourists? Seemin to suggest that the tourists had raised the humidity within themselves?

If anybody can help me with these please!! Thanks. :)
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In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing and fungus was growing on the walls.

"for cleaning and repair.." Is this phrase parallel? gerund and verb?


because moisture exhaled by tourists had raised the humidity within them to such levels that salt from the stone was crystallizing

Isn't the use of 'them' is somewhat ambiguous? As if it's referrin to tourists? Seemin to suggest that the tourists had raised the humidity within themselves?

If anybody can help me with these please!! Thanks. :)

Hi enasni
1) "for cleaning and repair.." Is this phrase parallel? gerund and verb?

repair here is used as a NOUN and gerund also acts as a NOUN..
so phrase is parallel..


2)Isn't the use of 'them' is somewhat ambiguous? As if it's referrin to tourists? Seemin to suggest that the tourists had raised the humidity within themselves?
since we have ONLY one subject, the Object pronoun should refer to that..
here SUBJECT is 'chamber', so 'them' should refer to 'chambers'..
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iliavko
Imagine the sentence

"The lady holding the little girl, who works in the supermarket, looks sad."

Is this correct? Or do we have ambiguity in the use of rel. pronoun "who" ? "holding" modifies "lady", "the little girl" refers to "holding" So here can the object of "who" be the lady? or it will be the girl?

I would keep it simple. The modifier "who works in the ....." touches "girl", hence it modifies "girl" without any ambiguity.
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soaringAlone
I don't think anyone has given a satisfactory reply to the question posed below ?

Can anyone answer the question, please?: Why "them" is correctly referring to the chambers in E and not to tourists as in C, D (as per explanation in OG 12)

Can anyone please answer this question?

If "experts" are not able to answer it, I am very sorry to say that they are not experts at all.

This said, however, I must thank everyone in this forum for their sometimes useful contributions.
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