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In light of the increasing evidence of the complexity of the body’s im

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In light of the increasing evidence of the complexity of the body’s im [#permalink]

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In light of the increasing evidence of the complexity of the body’s immune system, they now realize that their approach to finding a cure for cancer has been too simplistic.

(A) they now realize that their approach to finding a cure for cancer has been too simplistic.
(B) scientists now realize that their approach to finding a cure for cancer has been too simplistic.
(C) it is now realized that the approach at curing cancer was too simplistic in their approach.
(D) approaches by them at curing cancer have been too simplistic.
(E) they now realize that their approaches to curing cancer has been too simplistic.

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[Reveal] Spoiler: OA

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Re: In light of the increasing evidence of the complexity of the body’s im [#permalink]

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This is not a hard question if you realize one thing: In GMAT, pronouns always have to refer to something that makes sense. Therefore, "they" need to refer to something.

(A) they now realize that their approach to finding a cure for cancer has been too simplistic.
There's nothing to refer for "they".

(B) scientists now realize that their approach to finding a cure for cancer has been too simplistic.
Aha, "their" refers to scientists!

(C) it is now realized that the approach at curing cancer was too simplistic in their approach.
There's nothing to refer for "they" and "it"

(D) approaches by them at curing cancer have been too simplistic.
There's nothing to refer for "them".

(E) they now realize that their approaches to curing cancer has been too simplistic.
There's nothing to refer for "they".

[Reveal] Spoiler:
Answer: B

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Re: In light of the increasing evidence of the complexity of the body’s im [#permalink]

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New post 05 Oct 2017, 19:34
In light of the increasing evidence of the complexity of the body’s immune system, they now realize that their approach to finding a cure for cancer has been too simplistic.

(A) they now realize that their approach to finding a cure for cancer has been too simplistic. (We don't know who 'they' are)
(B) scientists now realize that their approach to finding a cure for cancer has been too simplistic. (Correct)
(C) it is now realized that the approach at curing cancer was too simplistic in their approach. (Usage of it and their is ambiguous)
(D) approaches by them at curing cancer have been too simplistic. (Usage of them is ambiguous)
(E) they now realize that their approaches to curing cancer has been too simplistic. (Same as A)

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In light of the increasing evidence of the complexity of the body’s im [#permalink]

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New post 05 Oct 2017, 19:42
(A) they now realize that their approach to finding a cure for cancer has been too simplistic. - Pronoun reference error
(B) scientists now realize that their approach to finding a cure for cancer has been too simplistic.
(C) it is now realized that the approach at curing cancer was too simplistic in their approach. - "their" has no proper antecendant
(D) approaches by them at curing cancer have been too simplistic. - Awkward construaction
(E) they now realize that their approaches to curing cancer has been too simplistic. - Pronoun reference error

Here, Option B is a clear winner!
'scientists' is the subject of the sentence. "their" clearly refers to scientists!
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In light of the increasing evidence of the complexity of the body’s im   [#permalink] 05 Oct 2017, 19:42
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