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GMAT-Prep Sc3

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Senior Manager
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GMAT-Prep Sc3 [#permalink]

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New post 17 Jan 2009, 04:53
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A
B
C
D
E

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Re: GMAT-Prep Sc3 [#permalink]

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New post 17 Jan 2009, 14:21
Actually I do not see any challange/incentive to answer the question that is answered.

A is straight for correct comparision and clear modifier.
B has correct comparision but wrong modifier.
C, D and E all have wrong comparision.
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Re: GMAT-Prep Sc3 [#permalink]

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New post 17 Jan 2009, 19:27
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While there may not be a challenge to this question, it helps to explain clearly to the other person why he/she is wrong. If it's an easy question, it's likely that the person is missing some fundamentals.

This is a comparison question. You know this when you see a sentence starting with Unlike X...,Y. If you ignore the smoke (an alien species blah blah) between X and Y, you'll see that they're trying to compare wheatgrass to something. i.e. Unlike crested wheatgrass, ......., native North American grasses develop an extensive root system.
So when you see "Unlike X..., Y", then the Y after the comma better be something that can be compared to X. For this reason you can eliminate C, D and E because we can't compare the wheatgrass to the "root system" or "extensiveness". A and B correctly compare the wheatgrass to the North American grasses, but B is wrong because of the modifier. It's the developing of the root system that allows enrichment of soil, not the root system itself that allows the enrichment.

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Re: GMAT-Prep Sc3 [#permalink]

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New post 19 Jan 2009, 05:51
As already explained, choice is between A and B. B has one obvious error of no parallel comparison before and after "but".

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Re: GMAT-Prep Sc3   [#permalink] 19 Jan 2009, 05:51
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