GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 14 Aug 2018, 20:11

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

QOTD: Fossils of the arm

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

MBA Section Director
User avatar
V
Joined: 19 Mar 2012
Posts: 5124
Location: India
GMAT 1: 760 Q50 V42
GPA: 3.8
WE: Marketing (Non-Profit and Government)
QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 31 Oct 2017, 00:13
13
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

71% (01:08) correct 29% (01:19) wrong based on 880 sessions

HideShow timer Statistics

Verbal Question of The Day: Day 146: Sentence Correction


Subscribe to GMAT Question of the Day: E-mail | RSS
For All QOTD Questions Click Here


Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles islands.

A. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of

B. sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on

C. sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of

D. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on

E. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of

Every question of the day will be followed by an expert reply by GMATNinja in 12-15 hours. Stay tuned! Post your answers and explanations to earn kudos.


https://www.nytimes.com/1996/04/16/science/mammal-bones-found-in-amber-for-first-time.html

Fossils of the arm of a sloth, found in Puerto Rico five years ago, have been dated at 34 million years old, making it the earliest known mammal on the islands and presumably an inhabitant at the time of the hypothesized separation, Dr. MacPhee said. The age of the amber-preserved mammal, though not precise, could be further evidence of when these migrations occurred, particularly of when they might have ended.

_________________

Have an MBA application Question? ASK ME ANYTHING!

My Stuff: Four Years to 760 | MBA Trends for Indian Applicants

My GMAT Resources
V30-V40: How to do it! | GMATPrep SC | GMATPrep CR | GMATPrep RC | Critical Reasoning Megathread | CR: Numbers and Statistics | CR: Weaken | CR: Strengthen | CR: Assumption | SC: Modifier | SC: Meaning | SC: SV Agreement | RC: Primary Purpose | PS/DS: Numbers and Inequalities | PS/DS: Combinatorics and Coordinates

My MBA Resources
Everything about the MBA Application | Over-Represented MBA woes | Fit Vs Rankings | Low GPA: What you can do | Letter of Recommendation: The Guide | Indian B Schools accepting GMAT score | Why MBA?

My Reviews
Veritas Prep Live Online

Most Helpful Expert Reply
GMAT Club Verbal Expert
User avatar
P
Status: GMAT and GRE tutor
Joined: 13 Aug 2009
Posts: 1896
Location: United States
GMAT 1: 780 Q51 V46
GMAT 2: 800 Q51 V51
GRE 1: Q170 V170
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 31 Oct 2017, 00:23
10
4
I’ve always had a soft spot for this question, just because it has such a wide variety of issues and errors. It also has an interesting little verb tense thing that really doesn’t matter at all: you could easily fixate on the difference between "was dated" (past tense) and "has/have been dated" (present perfect tense), but you don't have to choose between them at all. There are plenty of other issues to worry about instead.

Quote:
(A) sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of

The “it” (which presumably refers back to the sloth) is the first thing that jumps out at me. “Fossils of the arm of a sloth… made [the sloth] the earliest known mammal…” Huh? That makes no sense. How the heck would the fossils of a sloth make the sloth the earliest known mammal of the Greater Antilles?

The much smaller issue is that I see no real need for that first comma, but that’s unlikely to ever be a deciding factor on a GMAT question. But the nonsensical main clause is enough to wipe out (A).

Quote:
(B) sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on

This time, the pronoun “they” is the first thing that catches my eye. Who the heck is “they”? The fossils?

Plus, we have a subject-verb problem: “fossils… has been dated” is spectacularly wrong. (B) is gone.

Quote:
(C) sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of

Subject-verb fail again: “fossils… was dated.” Nope.

But there’s more: the phrase “that was found in Puerto Rico in 1991” seems to modify the sloth itself, and that makes no sense. Unless you think that the sloth had actually been alive for 34 million years. Maybe moving really slowly helps you live longer?

Finally, the word “this” is used as a singular pronoun, and that’s an unacceptable use of the word “this” on the GMAT. I’ve only ever seen “this” used as an article on the GMAT (“this week” or “this magnificent GMAT forum”), but never as a pronoun.

So we have lots of good reasons to eliminate (C).

Quote:
(D) sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on

This one looks pretty good. The subject-verb agreement works: “fossils… have been dated at 34 million years old…” Cool. The modifier “found in Puerto Rico in 1991” is nicely set apart with commas, so it seems to refer to the entire phrase “fossils of the arm of a sloth”, and not just the sloth itself, as we saw in (C).

And the last part of the underlined portion (“making the sloth the earliest known mammal…”) actually names the sloth instead of using a pronoun, and that adds a bit of extra clarity. It might not be strictly necessary, but it’s nice. We can keep (D).


Quote:
(E) sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of

Thanks to the modifier “which”, which typically modifies the immediately preceding noun, it really sounds like the sloth itself was found in Puerto Rico in 1991, and that makes no sense. (I also can’t make much sense of the comma placement in that part of the sentence, but again, comma placement isn’t really a major emphasis on GMAT SC.)

We also have the same problem that we had in (A): “fossils… made the sloth the earliest known mammal…” That’s nonsense, too.

So we can ditch (E), and (D) is our answer.
_________________

GMAT Club Verbal Expert | GMAT/GRE tutor @ www.gmatninja.com (Now hiring!) | GMAT blog | Food blog | Notoriously bad at PMs

Beginners' guides to GMAT verbal
Reading Comprehension | Critical Reasoning | Sentence Correction

YouTube LIVE verbal webinars
Series 1: Fundamentals of SC & CR | Series 2: Developing a Winning GMAT Mindset

SC & CR Questions of the Day (QOTDs), featuring expert explanations
All QOTDs | Subscribe via email | RSS

Need an expert reply?
Hit the request verbal experts' reply button -- and please be specific about your question. Feel free to tag @GMATNinja and @GMATNinjaTwo in your post. Priority is always given to official GMAT questions.

Sentence Correction articles & resources
How to go from great (760) to incredible (780) on GMAT SC | That "-ing" Word Probably Isn't a Verb | That "-ed" Word Might Not Be a Verb, Either | No-BS Guide to GMAT Idioms | "Being" is not the enemy | WTF is "that" doing in my sentence?

Reading Comprehension, Critical Reasoning, and other articles & resources
All GMAT Ninja articles on GMAT Club | Using LSAT for GMAT CR & RC |7 reasons why your actual GMAT scores don't match your practice test scores | How to get 4 additional "fake" GMAT Prep tests for $29.99 | Time management on verbal

General Discussion
Manager
Manager
User avatar
G
Joined: 30 Jan 2017
Posts: 86
Location: India
Schools: ISB '19
GMAT 1: 630 Q47 V29
GMAT 2: 660 Q47 V34
GMAT 3: 730 Q49 V40
GPA: 3.9
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 31 Oct 2017, 01:02
2
souvik101990 wrote:

Verbal Question of The Day: Day 146: Sentence Correction


Subscribe to GMAT Question of the Day: E-mail | RSS
For All QOTD Questions Click Here


Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles islands.

A. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of

B. sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on

C. sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of

D. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on

E. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of

Every question of the day will be followed by an expert reply by GMATNinja in 12-15 hours. Stay tuned! Post your answers and explanations to earn kudos.



Option A :
Verb tense : "made" is incorrect as the fact still stands true.
Construction : "comma + and" requires an Independent clause. However, "dated" has no subject

Doubt: Which of the following construction is correct:
Subject Verb1 ,and Verb2
Subject Verb1 and Verb2


Option B:
Pronoun : "they" has no clear antecedent
Subject Verb : Fossils (plu) and "has been dated" (singular)

Option C:
Subject Verb : Fossils (plu) and "was dated" (singular)
Pronoun : "this" has no clear antecedent

Option D:
Subject Verb : Fossils (plu) and "have been dated" (plu)
Construction : Verb+ing form states the result of the finding and has the same subject as that of modified clause
Pronoun : Replaces "this" with "the sloth"

Option E:
Subject Verb : Fossils (plu) and "was dated" (singular)
Verb tense : "made" is incorrect as the fact still stands true.

Answer : D
Intern
Intern
User avatar
B
Joined: 21 Mar 2017
Posts: 37
Location: Viet Nam
Concentration: Finance, International Business
WE: General Management (Pharmaceuticals and Biotech)
GMAT ToolKit User
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 31 Oct 2017, 01:18
Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles islands.

A, C and E out because wrong usage of preposition "of"

Option B: (1) "fossils" is plural so "has" is wrong; (2) "they" is ambiguous; (3) "thus" is redundant

A. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of

B. sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on

C. sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of

D. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on - Correct

E. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of
_________________

+1 kudos if you find my posts helpful

Manager
Manager
User avatar
S
Status: Aiming MBA!!
Joined: 19 Aug 2017
Posts: 137
Location: India
GMAT 1: 620 Q49 V25
GPA: 3.75
WE: Web Development (Consulting)
Reviews Badge
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post Updated on: 31 Oct 2017, 14:24
Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles islands.

Analysing the original sentence,

1. FOUND can be a VERB or a VERB-ED modifier. As sloth is present next to found, it seems "found" is the verb for sloth. But, sloth cannot do this action of finding. Thus, found is not the verb for sloth. Similarly, found is not even the verb for arms as well as fossils.
Edit -- Point 1 is only for clarification that found is NOT A VERB here. It is NOT the reason for rejecting option A. Its just a clarification.

2. Found as a VERB-ed MODIFIER can modify any of these 3 : fossils; arm; sloth. But the portion after "and", dated clears this confusion. As dated cannot modify sloth or arm.
Edit -- Point 2 is only for the clarification that "found" as a VERB-ed modifier is modifying fossils only. It is also NOT the reason for rejecting option A. Its again just a clarification for the doubt which I actually had when I first solved this question.

3. The COMMA before AND is not making sense. Since its only a list of two items. For a list of more than two items, we place a COMMA before AND.

4. The pronoun "it" is ambiguous. As it can refer to the arm as well as the sloth.

A. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
INCORRECT for the reasons mentioned above.

B. sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on
"They" refers to whom?? ALso, Has been dated indicates the PRONOUN NUMBER AGREEMENT ERROR as the SUBJECT fossils is plural. The pronoun "it" can refer to the sloth as well as the arm. Therefore, INCORRECT.

C. sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of
The usage of relative pronoun "that" next to sloth changes the intended meaning. It implies that the sloth was found in Puerto Rico in 1991. "that" cannot refer to the fossils because the verb after "that" is singular (was found AND even was dated) and not plural. "Was Dated" indicates the PRONOUN NUMBER AGREEMENT ERROR as the SUBJECT fossils is plural. Usage of the Demonstrative Pronoun "THIS" is also wrong here.

D. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on
CORRECT. For the following reasons,
1. PRONOUN NUMBER AGREEMENT ERROR : is resolved as have been dated correctly refers to the fossils.
2. Making (the VERB-ing modifier) refers correctly to the subject ("fossils") of the preceding clause.
3. PRONOUN AMBIGUITY ERROR : Here, the pronoun "it" is correctly replaced by the sloth.


E. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of
Here, the relative pronoun "which" refers to sloth, making the sentence sound illogical. As it appears "the sloth was dated at...". Usage of WHICH without a preceding comma or a preposition is also incorrect. The overall structure of this option is awkward and hence, INCORRECT. The VERB-ed modifier ("made") is also dangling as its not clear actually what it is modifying as VERB-ed modifiers can modify the preceding noun only.

Originally posted by aceGMAT21 on 31 Oct 2017, 04:49.
Last edited by aceGMAT21 on 31 Oct 2017, 14:24, edited 1 time in total.
Intern
Intern
avatar
B
Joined: 20 Jul 2012
Posts: 28
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 31 Oct 2017, 07:20
A. Fossils...made it...it doesn't agree with Subject fossils. Also fossils cannot be the mammal.
B. They refers to what is not known. Fossils doesn't agree with has. It refers to what ?
C. Sloth was not found. Fossils were found. Fossils doesn't agree with was. Making this...this ? What is this referring to.
D. After comma there is extra info about the previous phrase. Making the sloth.....provides extra info about the previous clause. Seems ok.
E. which , doesn't make sense here. Was dated doesn't agree with fossils.

Sent from my Moto G (5S) Plus using GMAT Club Forum mobile app
Intern
Intern
avatar
B
Joined: 28 Apr 2017
Posts: 42
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 31 Oct 2017, 10:29
D is the answer as rest have either a pronoun or tense issue. Fossils are plural hence need have//are
e-GMAT Representative
User avatar
G
Joined: 02 Nov 2011
Posts: 2614
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 31 Oct 2017, 13:42
1
Hello fmik7894

You have presented a good analysis of this rather confusing official sentence. Great job there. :thumbup:

I will be glad to help you out with your query. :-)


Quote:
Doubt: Which of the following construction is correct:
Subject Verb1 ,and Verb2
Subject Verb1 and Verb2



Out of the two structures, the second structure is ideal because the connector is not followed by a comma when it joins only two entities in a parallel list.

Having said that, I would like to add that the first structure is not incorrect. There can be a comma before the connector even if it joins only two elements in the parallel list.

We see such structure when the parallel elements are pretty long. So the comma before the connector presents a necessary pause to help understand the meaning of the sentence better.


Quote:
Option A :
Construction : "comma + and" requires an Independent clause. However, "dated" has no subject



Please note that dated is NOT a verb in this official sentence. It is a verb-ed modifier like found. Since found and dated has been used as noun modifiers in this sentence, they form a parallel list and hence, we see dated preceded by and.


Hope this helps. :-)
Thanks.
Shraddha
_________________












| '4 out of Top 5' Instructors on gmatclub | 70 point improvement guarantee | www.e-gmat.com

e-GMAT Representative
User avatar
G
Joined: 02 Nov 2011
Posts: 2614
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 31 Oct 2017, 14:06
aceGMAT21 wrote:
Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles islands.

Analysing the original sentence,

1. FOUND can be a VERB or a VERB-ED modifier. As sloth is present next to found, it seems "found" is the verb for sloth. But, sloth cannot do this action of finding. Thus, found is not the verb for sloth. Similarly, found is not even the verb for arms as well as fossils.

2. Found as a VERB-ed MODIFIER can modify any of these 3 : fossils; arm; sloth. But the portion after "and", dated clears this confusion. As dated cannot modify sloth or arm.

3. The COMMA before AND is not making sense. Since its only a list of two items. For a list of more than two items, we place a COMMA before AND.

4. The pronoun "it" is ambiguous. As it can refer to the arm as well as the sloth.

A. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
INCORRECT for the reasons mentioned above.

B. sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on
"They" refers to whom?? ALso, Has been dated indicates the PRONOUN NUMBER AGREEMENT ERROR as the SUBJECT fossils is plural. The pronoun "it" can refer to the sloth as well as the arm. Therefore, INCORRECT.

C. sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of
The usage of relative pronoun "that" next to sloth changes the intended meaning. It implies that the sloth was found in Puerto Rico in 1991. "that" cannot refer to the fossils because the verb after "that" is singular (was found AND even was dated) and not plural. "Was Dated" indicates the PRONOUN NUMBER AGREEMENT ERROR as the SUBJECT fossils is plural. Usage of the Demonstrative Pronoun "THIS" is also wrong here.

D. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on
CORRECT. For the following reasons,
1. PRONOUN NUMBER AGREEMENT ERROR : is resolved as have been dated correctly refers to the fossils.
2. Making (the VERB-ing modifier) refers correctly to the subject ("fossils") of the preceding clause.
3. PRONOUN AMBIGUITY ERROR : Here, the pronoun "it" is correctly replaced by the sloth.


E. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of
Here, the relative pronoun "which" refers to sloth, making the sentence sound illogical. As it appears "the sloth was dated at...". Usage of WHICH without a preceding comma or a preposition is also incorrect. The overall structure of this option is awkward and hence, INCORRECT. The VERB-ed modifier ("made") is also dangling as its not clear actually what it is modifying as VERB-ed modifiers can modify the preceding noun only.





Hello aceGMAT21,


Great job in presenting such a detailed analysis of this question. :thumbup:

I would just like to add my two cents on a few points of your analysis.


Quote:
1. FOUND can be a VERB or a VERB-ED modifier. As sloth is present next to found, it seems "found" is the verb for sloth. But, sloth cannot do this action of finding. Thus, found is not the verb for sloth. Similarly, found is not even the verb for arms as well as fossils.



I am afraid your analysis is not correct here. The word found cannot be and is not a verb in this official sentence because the context of the sentence makes it absolutely clear.

If we pay attention to structure and the context of the sentence, we will know instantly that found has been used a verb-ed modifier because there is no object for this verb in the entire sentence.


Quote:
2. Found as a VERB-ed MODIFIER can modify any of these 3 : fossils; arm; sloth. But the portion after "and", dated clears this confusion. As dated cannot modify sloth or arm.



A modifier must logically modify an entity. Now the modifiers found and dated form a parallel list in the sentence, indicating that they have been used to modify the same entity. So from the context of the sentence, we understand that whatever has been found has been dated at 34 million years old.

On the basis of this analysis, neither sloth nor arm can be the entity the modifier found is meant to modify because neither a sloth not its arm would exist for that long. It is only the fossils that can exist that long (or even longer).

So logically, found and dated modify fossils only.



Hope this helps. :-)
Thanks.
Shraddha
_________________












| '4 out of Top 5' Instructors on gmatclub | 70 point improvement guarantee | www.e-gmat.com

Director
Director
User avatar
S
Joined: 08 Jun 2015
Posts: 529
Location: India
GMAT 1: 640 Q48 V29
GMAT 2: 700 Q48 V38
Premium Member CAT Tests
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 01 Nov 2017, 05:58
The answer must be option D. My take :

Meaning : The intended meaning of this sentence is - Fossils of the arm of a sloth were found in Puerto Rico in 1991. These fossils have been dated at 34 million years old. Based on the aforementioned finding it can be concluded that sloth was the earliest known mammal of Greater Antilles Islands.

Error Analysis : In the given question, the use of comma is wrong. Comma plus "and" is used to join an IC to an IC. We don't see an IC in the phrase between the two commas. Moreover it refers to fossils. How can fossils be the earliest known mammals ? This is nonsensical.

POE

Option A : Wrong for the reason mentioned above
Option B : " they found it " - who ?? Fossils is plural must use plural form of verb. Has is wrong here. - Wrong
Option C : Meaning shift. It was not the sloth that was found in 1991, but fossils. - Wrong
Option D : Correct use of comma. Meaning correctly conveyed. SVA in place - Correct
Option E : Use of "was" is wrong. Fossils - Plural Subject will require plural verb. Moreover use of which is incorrect. The meaning gets changes here. As mentioned in option C, the meaning conveyed here is that sloth was found in 1991. This is incorrect. - Wrong

Based on the analysis above , we narrow down to option D.
_________________

" The few , the fearless "

Intern
Intern
avatar
B
Joined: 20 Jun 2017
Posts: 35
GMAT 1: 580 Q36 V32
GMAT 2: 660 Q39 V41
GRE 1: Q159 V160
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 01 Nov 2017, 17:35
GMATNinja wrote:
I’ve always had a soft spot for this question, just because it has such a wide variety of issues and errors. It also has an interesting little verb tense thing that really doesn’t matter at all: you could easily fixate on the difference between "was dated" (past tense) and "has/have been dated" (present perfect tense), but you don't have to choose between them at all. There are plenty of other issues to worry about instead.

Quote:
(A) sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of

The “it” (which presumably refers back to the sloth) is the first thing that jumps out at me. “Fossils of the arm of a sloth… made [the sloth] the earliest known mammal…” Huh? That makes no sense. How the heck would the fossils of a sloth make the sloth the earliest known mammal of the Greater Antilles?

The much smaller issue is that I see no real need for that first comma, but that’s unlikely to ever be a deciding factor on a GMAT question. But the nonsensical main clause is enough to wipe out (A).

Quote:
(B) sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on

This time, the pronoun “they” is the first thing that catches my eye. Who the heck is “they”? The fossils?

Plus, we have a subject-verb problem: “fossils… has been dated” is spectacularly wrong. (B) is gone.

Quote:
(C) sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of

Subject-verb fail again: “fossils… was dated.” Nope.

But there’s more: the phrase “that was found in Puerto Rico in 1991” seems to modify the sloth itself, and that makes no sense. Unless you think that the sloth had actually been alive for 34 million years. Maybe moving really slowly helps you live longer?

Finally, the word “this” is used as a singular pronoun, and that’s an unacceptable use of the word “this” on the GMAT. I’ve only ever seen “this” used as an article on the GMAT (“this week” or “this magnificent GMAT forum”), but never as a pronoun.

So we have lots of good reasons to eliminate (C).

Quote:
(D) sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on

This one looks pretty good. The subject-verb agreement works: “fossils… have been dated at 34 million years old…” Cool. The modifier “found in Puerto Rico in 1991” is nicely set apart with commas, so it seems to refer to the entire phrase “fossils of the arm of a sloth”, and not just the sloth itself, as we saw in (C).

And the last part of the underlined portion (“making the sloth the earliest known mammal…”) actually names the sloth instead of using a pronoun, and that adds a bit of extra clarity. It might not be strictly necessary, but it’s nice. We can keep (D).


Quote:
(E) sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of

Thanks to the modifier “which”, which typically modifies the immediately preceding noun, it really sounds like the sloth itself was found in Puerto Rico in 1991, and that makes no sense. (I also can’t make much sense of the comma placement in that part of the sentence, but again, comma placement isn’t really a major emphasis on GMAT SC.)

We also have the same problem that we had in (A): “fossils… made the sloth the earliest known mammal…” That’s nonsense, too.

So we can ditch (E), and (D) is our answer.


Could you look at my post https://gmatclub.com/forum/what-happened-246117.html
Study Buddy Forum Moderator
User avatar
D
Joined: 04 Sep 2016
Posts: 1164
Location: India
WE: Engineering (Other)
Premium Member CAT Tests
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 22 Apr 2018, 05:23
GMATNinja egmat VeritasPrepKarishma

Quote:

(A) Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles islands.

(D)sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on



Is this one of few rare occasions in which coma+verb-ing modifier (coma + making) makes
more sense with subject of the earlier clause - a sloth - than the verb - made in (A)

In (D), the coma+making modifies complete earlier clause and the subject of earlier clause is: Fossils of the arm of a sloth

Can you elaborate why is there a pronoun ambiguity in :
Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old,made it the earliest known mammal of the Greater Antilles islands.

Is there any significant distinction between usage of pronoun on / of after mammal?
_________________

It's the journey that brings us happiness not the destination.

Intern
Intern
User avatar
B
Joined: 31 Jan 2018
Posts: 21
Location: Germany
GPA: 3
WE: Supply Chain Management (Manufacturing)
GMAT ToolKit User CAT Tests
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 22 Apr 2018, 05:48
Hey,

I've a question regarding the last part of answer D:

"D. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on"

So, "making" modifies "Fossils of the arm of a sloth". Isn't the placement a bit far away? I thought the modifier should be placed as close as possibile.

Cheers :)
Veritas Prep GMAT Instructor
User avatar
P
Joined: 16 Oct 2010
Posts: 8184
Location: Pune, India
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 22 Apr 2018, 23:17
adkikani wrote:
GMATNinja egmat VeritasPrepKarishma

Quote:

(A) Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles islands.

(D)sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on



Is this one of few rare occasions in which coma+verb-ing modifier (coma + making) makes
more sense with subject of the earlier clause - a sloth - than the verb - made in (A)

In (D), the coma+making modifies complete earlier clause and the subject of earlier clause is: Fossils of the arm of a sloth

Can you elaborate why is there a pronoun ambiguity in :
Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old,made it the earliest known mammal of the Greater Antilles islands.

Is there any significant distinction between usage of pronoun on / of after mammal?


In option (A), "found in .." and "dated at ..." are two parallel modifiers.
The main clause is "Fossils of the arm of a sloth ... made it the earliest known mammal of the Greater Antilles islands"
This makes no sense.

What made it the earliest known mammal? Dating the fossil at 34 million years. This is clarified in (D)
Fossils of the arm of a sloth ... have been dated at 34 million years old, making the sloth the earliest known mammal ...
The participle "making the sloth ..." modifies the entire preceding clause.

"mammal of the islands" seems to imply that the mammal belongs to the islands, perhaps exclusively. I would much rather prefer the use of "on" which implies that we are talking about the mammals found on the islands.
_________________

Karishma
Veritas Prep GMAT Instructor

Save up to $1,000 on GMAT prep through 8/20! Learn more here >

GMAT self-study has never been more personalized or more fun. Try ORION Free!

Senior Manager
Senior Manager
avatar
B
Joined: 17 Sep 2016
Posts: 286
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 28 Apr 2018, 05:56
Hi experts

Quote:
A. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
E. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of


I did not pick them up because i think it is illogical to say fossils can make some opinions, while the found of fossils can make some opinions

mikemcgarry, GMATNinjaTwo, GMATNinja, MagooshExpert Carolyn,
sayantanc2
VeritasPrepKarishma
Would you please confirm ?

Thanks in advance

Have a nice day
>_~
GMAT Club Verbal Expert
User avatar
P
Status: GMAT and GRE tutor
Joined: 13 Aug 2009
Posts: 1896
Location: United States
GMAT 1: 780 Q51 V46
GMAT 2: 800 Q51 V51
GRE 1: Q170 V170
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 31 May 2018, 10:49
zoezhuyan wrote:
Hi experts

Quote:
A. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
E. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of


I did not pick them up because i think it is illogical to say fossils can make some opinions, while the found of fossils can make some opinions

Would you please confirm ?

Thanks in advance

Have a nice day
>_~

I'm not quite sure what you mean by "opinions" in this question. I assume you're referring to the idea that the discovery of the fossils "made the sloth the earliest known mammal of the Greater Antilles islands"...? That's not an opinion, exactly, but I agree that it's illogical to say that "fossils... made the sloth the earliest known mammal..."

Here's (D) again:

    "Fossils of the arm of a sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on the Greater Antilles Islands."

Notice that the phrase "making the sloth the earliest known mammal..." is now a modifier, not a verb phrase. That phrase is just modifying the previous clause: "Fossils of the arm of a sloth... have been dated at 34 million years old..." And that actually makes a lot of sense: the fossils are really freaking old, and that fact makes the sloth the earliest known mammal of the Greater Antilles. Because that last "-ing" phrase modifies the entire previous clause, the sentence isn't saying that the fossils themselves "made" the sloth the earliest known mammal -- it's saying that the act of dating the fossils made it the earliest known mammal.

I hope this helps!
_________________

GMAT Club Verbal Expert | GMAT/GRE tutor @ www.gmatninja.com (Now hiring!) | GMAT blog | Food blog | Notoriously bad at PMs

Beginners' guides to GMAT verbal
Reading Comprehension | Critical Reasoning | Sentence Correction

YouTube LIVE verbal webinars
Series 1: Fundamentals of SC & CR | Series 2: Developing a Winning GMAT Mindset

SC & CR Questions of the Day (QOTDs), featuring expert explanations
All QOTDs | Subscribe via email | RSS

Need an expert reply?
Hit the request verbal experts' reply button -- and please be specific about your question. Feel free to tag @GMATNinja and @GMATNinjaTwo in your post. Priority is always given to official GMAT questions.

Sentence Correction articles & resources
How to go from great (760) to incredible (780) on GMAT SC | That "-ing" Word Probably Isn't a Verb | That "-ed" Word Might Not Be a Verb, Either | No-BS Guide to GMAT Idioms | "Being" is not the enemy | WTF is "that" doing in my sentence?

Reading Comprehension, Critical Reasoning, and other articles & resources
All GMAT Ninja articles on GMAT Club | Using LSAT for GMAT CR & RC |7 reasons why your actual GMAT scores don't match your practice test scores | How to get 4 additional "fake" GMAT Prep tests for $29.99 | Time management on verbal

e-GMAT Representative
User avatar
G
Joined: 02 Nov 2011
Posts: 2614
Re: QOTD: Fossils of the arm  [#permalink]

Show Tags

New post 31 May 2018, 14:47
fallenx wrote:
Hey,

I've a question regarding the last part of answer D:

"D. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on"

So, "making" modifies "Fossils of the arm of a sloth". Isn't the placement a bit far away? I thought the modifier should be placed as close as possibile.

Cheers :)



Hello fallenx,

I am not sure if you still have this doubt. Here is the answer nonetheless. :-)


In Choice D, comma + making... is an action modifier, and hence, it modifies the action - have been dated at - in the preceding clause.

Please note that comma + making... is not a noun modifier that needs to be placed closer to Fossils of the arm of the sloth.

As an action modifier, comma + making... suggests that because these fossils are so very old, this information makes the sloth the earliest known mammal in the said region.


Hope this helps. :-)
Thanks.
Shraddha
_________________












| '4 out of Top 5' Instructors on gmatclub | 70 point improvement guarantee | www.e-gmat.com

Re: QOTD: Fossils of the arm &nbs [#permalink] 31 May 2018, 14:47
Display posts from previous: Sort by

QOTD: Fossils of the arm

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Events & Promotions

PREV
NEXT


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.