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Comparison Revision: Numerous studies have shown that

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This question is part of the GMAT Club Sentence Correction : Comparison" Revision Project.

Numerous studies have shown that the income levels of working adults who were students of average academic ability often surpass the income levels of those adults who were once students of exceptional academic abilities.

A. the income levels of those adults who were once students of exceptional academic abilities

B. those of adults who had been exceptionally able students academically

C. those of adults who were students of exceptional academic ability

D. adults who were students of exceptional academic ability

E. the incomes of adults who had been students of exceptional academic ability
[Reveal] Spoiler: OA

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Re: Comparison Revision: Numerous studies have shown that [#permalink]

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New post 25 Feb 2015, 10:30
A. the income levels of those adults who were once students of exceptional academic abilities

B. those of adults who had been exceptionally able students academically

C. those of adults who were students of exceptional academic ability - correct

D. adults who were students of exceptional academic ability - wrong comparison

E. the incomes of adults who had been students of exceptional academic ability - wrong

OA - C
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Re: Comparison Revision: Numerous studies have shown that [#permalink]

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New post 25 Feb 2015, 11:42
C is correct.
in A - the income levels of those adults - redundant
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Re: Comparison Revision: Numerous studies have shown that [#permalink]

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New post 25 Feb 2015, 23:49
Clearly C compares both the groups
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Re: Comparison Revision: Numerous studies have shown that [#permalink]

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New post 26 Feb 2015, 00:09
students of exceptional academic abilities- sounds wrong. It has to be exceptionally able students academically? Basically it should mean students with exceptional abilities

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Re: Comparison Revision: Numerous studies have shown that [#permalink]

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New post 26 Feb 2015, 01:22
souvik101990 wrote:
This question is part of the GMAT Club Sentence Correction : Comparison" Revision Project.

Numerous studies have shown that the income levels of working adults who were students of average academic ability often surpass the income levels of those adults who were once students of exceptional academic abilities.

A. the income levels of those adults who were once students of exceptional academic abilities

B. those of adults who had been exceptionally able students academically

C. those of adults who were students of exceptional academic ability

D. adults who were students of exceptional academic ability

E. the incomes of adults who had been students of exceptional academic ability


+1 for C. Has the correct comparison.

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Re: Comparison Revision: Numerous studies have shown that [#permalink]

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Numerous studies have shown that the income levels of working adults who were students of average academic ability often surpass the income levels of those adults who were once students of exceptional academic abilities.

A. the income levels of those adults who were once students of exceptional academic abilities..
once is redundant.. does not follow parallelism
B. those of adults who had been exceptionally able students academically
no requirement of had been and structure of the sentence not proper

C. those of adults who were students of exceptional academic ability
correct as it is

D. adults who were students of exceptional academic ability
wrong comparisons

E. the incomes of adults who had been students of exceptional academic ability
had been not required
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Comparison Revision: Numerous studies have shown that [#permalink]

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The original sentence correctly makes a comparison between the income levels of
working adults who were average students and the income levels of students who
were exceptional students. These two elements are logically parallel, and thus should
be structurally parallel. However, this sentence is problematic in its use of the term
"those adults," since the pronoun "those" is both unnecessary and not parallel in this
context. Also, the phrase “of exceptional academic abilities” is not precisely parallel
to the phrase “of average academic ability” in the non-underlined portion of the
sentence. As this sentence makes a comparison, the two elements should be as
parallel as possible.
(A) This choice is incorrect as it repeats the original sentence.
(B) This choice correctly uses "those" to refer to income levels, enabling a correctly
framed comparison. However, it incorrectly uses the past perfect tense "had been,"
which is unjustified by the sentence and is not parallel to the simple past tense "were"
used earlier to describe students of average academic ability. Finally, “exceptionally
able students academically” is both unparallel and awkward.
(C) CORRECT. The pronoun "those" is correctly used to refer to income levels,
enabling a properly drawn comparison. Additionally, the simple past tense verb
"were" is parallel to the verb "were" in the non-underlined portion of the sentence.
(D) This choice incorrectly compares income level to adults, rather than the proper
comparison between income levels and income levels.
(E) This choice incorrectly uses the past perfect tense “had been," which is unjustified
and also not parallel to the non-underlined simple past tense verb "were."
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Re: Comparison Revision: Numerous studies have shown that [#permalink]

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Re: Comparison Revision: Numerous studies have shown that [#permalink]

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New post 28 Jun 2017, 23:00
a change from "abilities" to "ability" in C do not affect the sentence at all. If it does not some effects, what is the grammar issue here?

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New post 29 Jun 2017, 04:12
Numerous studies have shown that the income levels of working adults who were students of average academic ability often surpass the income levels of those adults who were once students of exceptional academic abilities.
A. the income levels of those adults who were once students of exceptional academic abilities – the two groups are not structurally parallel; usage of once is redundant
B. those of adults who had been exceptionally able students academically – parallelism issue ; usage of past perfect had been is incorrect
C. those of adults who were students of exceptional academic ability - Correct
D. adults who were students of exceptional academic ability – illogical comparison
E. the incomes of adults who had been students of exceptional academic ability -usage of past perfect had been is incorrect
Answer C
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Comparison Revision: Numerous studies have shown that [#permalink]

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New post 29 Jun 2017, 06:41
Skywalker18 wrote:
Numerous studies have shown that the income levels of working adults who were students of average academic ability often surpass the income levels of those adults who were once students of exceptional academic abilities.
A. the income levels of those adults who were once students of exceptional academic abilities – the two groups are not structurally parallel; usage of once is redundant
B. those of adults who had been exceptionally able students academically – parallelism issue ; usage of past perfect had been is incorrect
C. those of adults who were students of exceptional academic ability - Correct
D. adults who were students of exceptional academic ability – illogical comparison
E. the incomes of adults who had been students of exceptional academic ability -usage of past perfect had been is incorrect
Answer C


what I want to know is whether there is any problem, or any issue with changing from "abilities" to "ability"

Last edited by chesstitans on 29 Jun 2017, 07:01, edited 1 time in total.

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Re: Comparison Revision: Numerous studies have shown that [#permalink]

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New post 29 Jun 2017, 06:44
chesstitans wrote:
a change from "abilities" to "ability" in C do not affect the sentence at all. If it does not some effects, what is the grammar issue here?


Though A and C are both gramatically correct, C uses fewer words to express the same idea. Hence C is better than E ( concision).

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Re: Comparison Revision: Numerous studies have shown that [#permalink]

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New post 29 Jun 2017, 07:55
chesstitans wrote:
Skywalker18 wrote:
Numerous studies have shown that the income levels of working adults who were students of average academic ability often surpass the income levels of those adults who were once students of exceptional academic abilities.
A. the income levels of those adults who were once students of exceptional academic abilities – the two groups are not structurally parallel; usage of once is redundant
B. those of adults who had been exceptionally able students academically – parallelism issue ; usage of past perfect had been is incorrect
C. those of adults who were students of exceptional academic ability - Correct
D. adults who were students of exceptional academic ability – illogical comparison
E. the incomes of adults who had been students of exceptional academic ability -usage of past perfect had been is incorrect
Answer C


what I want to know is whether there is any problem, or any issue with changing from "abilities" to "ability"


for me A is wrong because it is using "the income levels" and "those" one can use either "the income levels or those" C is precise...It uses "those" which represents "the income levels"
C says The Income Level of working adults often surpass those [the income levels] of adults who were once.....precise and clear
One can see that the original sentence uses "students of Average academic ability" one can see that average academic ability stands as one unit and changing it to abilities in A might be wrong because we are comparing average academic ability to exceptional academic ability.
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Re: Comparison Revision: Numerous studies have shown that [#permalink]

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New post 29 Jun 2017, 09:22
I have a question regarding A
if once is removed from option A will it be correct then ?
Is abilities in A a split ?
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Re: Comparison Revision: Numerous studies have shown that [#permalink]

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New post 13 Sep 2017, 00:51
sayantanc2k wrote:
chesstitans wrote:
a change from "abilities" to "ability" in C do not affect the sentence at all. If it does not some effects, what is the grammar issue here?


Though A and C are both gramatically correct, C uses fewer words to express the same idea. Hence C is better than E ( concision).


If in C, 'those' refers to 'the income levels' then C becomes as following:

Numerous studies have shown that the income levels of working adults who were students of average academic ability often surpass the income levels of adults who were students of exceptional academic ability.

This does not say about the type of adults, whereas in original sentence it is said that the adults were working adults.

Doesn't option C change the meaning?
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Re: Comparison Revision: Numerous studies have shown that   [#permalink] 13 Sep 2017, 00:51
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