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Need help with this question

Expert replies
by hemant_rajput » Thu Jan 03, 2013 8:53 am
Hi all,

This is the question from official guide of GMAT 12th edition. Can anyone help me understand, why "as well as gesturing" in option C make the choice wrong?

Q.

Researchers have found that individuals who have
been blind from birth, and who thus have never seen
anyone gesture, nevertheless make hand motions
when speaking just as frequently and in virtually the
same way as sighted people do, and that they will
gesture even when conversing with another blind
person.
(A) who thus have never seen anyone gesture,
nevertheless make hand motions when speaking
just as frequently and in virtually the same way
as sighted people do, and that they will gesture
(B) who thus never saw anyone gesturing,
nevertheless make hand motions when speaking
just as frequent and in virtually the same way as
sighted people did, and that they will gesture
(C) who thus have never seen anyone gesture,
nevertheless made hand motions when speaking
just as frequently and in virtually the same way
as sighted people do, as well as gesturing
(D) thus never having seen anyone gesture,
nevertheless made hand motions when speaking
just as frequent and in virtually the same way as
sighted people did, as well as gesturing
(E) thus never having seen anyone gesture,
nevertheless to make hand motions when
speaking just as frequently and in virtually the
same way as sighted people do, and to gesture
[spoiler]
OA - A[/spoiler][spoiler][/spoiler]
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Source: — Sentence Correction |

by Jim@StratusPrep » Thu Jan 03, 2013 11:43 am
have never seen is the proper construction for the present perfect tense, which is needed here.

This leaves A and C.

C is eliminated because you introduce the past tense with 'made hand motions' when it is not necessary.
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by hemant_rajput » Sat Jan 05, 2013 9:03 am
Jim@StratusPrep wrote:have never seen is the proper construction for the present perfect tense, which is needed here.

This leaves A and C.

C is eliminated because you introduce the past tense with 'made hand motions' when it is not necessary.
Hey Jim,

I'm still confused. So Option C is incorrect because of past tense error not because of choice between "and that they will gesture " and "as well as gesturing", am I correct?
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