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Recently documentedc, the production of new brain cells,

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Recently documentedc, the production of new brain cells, [#permalink]

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New post 05 Nov 2011, 22:29
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Recently documentedc, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that

Why not b?
[Reveal] Spoiler: OA
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Re: neurogenesis [#permalink]

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New post 05 Nov 2011, 23:15
devinawilliam83 wrote:
Recently documentedc, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or vcanaries whose neurons increase when theyx[/color]
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that

Why not b?



It is definitely not B because THEY in B is not clear - canaries whose neurons increase when they

Whether THEY refers to canaries or neurons.
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Re: neurogenesis [#permalink]

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New post 07 Nov 2011, 01:33
'They' in B is very ambiguous.

E is the clearest and the most concise one.

+ 1 for E
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Re: neurogenesis [#permalink]

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New post 07 Nov 2011, 09:40
devinawilliam83 wrote:
Recently documentedc, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that

Why not b?


A is unclear
B - the production of new brain cells, include mice whose brains - need to talk about brain changes , this phrase alters the sense.
C - unclear reference (that and they)
D - says the brain growth when placed in simulationg env and increase in canaries without simulating env -- altered meaning.
E - explains the effects of mice's brain when placed in simulating env
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Re: Recently documentedc, the production of new brain cells, [#permalink]

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New post 15 Oct 2014, 20:29
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Recently documentedc, the production of new brain cells, [#permalink]

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New post 27 Apr 2016, 05:40
They is NOT ambiguous at all - and remember that certain levels of pronoun ambiguity is allowed on the GMAT.

However, the problem with option B is that the word "include" must introduce examples, and mice (or canaries) are not examples of brain development.
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Re: Recently documentedc, the production of new brain cells,   [#permalink] 27 Apr 2016, 05:40
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