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Contrary to earlier conjectures

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by dongkim2 » Sun Jun 13, 2010 3:59 pm
Contrary to earlier conjectures, it may be that increased atmospheric carbon dioxide as a result of burning fossil fuels would cool the globe by reducing the amount of solar energy absorbed by snow.
(A) increased atmospheric carbon dioxide as a result of burning
(B) increased atmospheric carbon dioxide resulting from the combustion of
(C) increasing carbon dioxide in the atmosphere resulting from the combustion of
(D) carbon dioxide in the atmosphere that increase from burning
(E) atmospheric carbon dioxide that increased from burning

OA-[spoiler]B
Can anyone explain what is the difference between B and C?
I couldn't understand the difference at all. Thanks!
[/spoiler]
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by grockit_andrea » Sun Jun 13, 2010 4:52 pm
dongkim2 wrote:Contrary to earlier conjectures, it may be that increased atmospheric carbon dioxide as a result of burning fossil fuels would cool the globe by reducing the amount of solar energy absorbed by snow.
(A) increased atmospheric carbon dioxide as a result of burning
(B) increased atmospheric carbon dioxide resulting from the combustion of
(C) increasing carbon dioxide in the atmosphere resulting from the combustion of
(D) carbon dioxide in the atmosphere that increase from burning
(E) atmospheric carbon dioxide that increased from burning

OA-[spoiler]B
Can anyone explain what is the difference between B and C?
I couldn't understand the difference at all. Thanks!
[/spoiler]
"[R]esulting from the combustion of" is a modifying phrase, and on the GMAT that means that it modifies whatever is next to it. In choice C, the phrase is next to "atmosphere," but we know it's not the atmosphere that results from the combustion; it's the carbon dioxide. Choice B correctly places the modifying phrase next to the noun it modifies.
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by this_time_i_will » Sun Jun 13, 2010 5:07 pm
choice C gives a meaning ad if the amount of carbon dioxide can be controlled; its amount can be increased.
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by loi.fu.yogi » Sun Jun 13, 2010 6:51 pm
How did you all eliminate 'E'? I thought, increase is because of burning fossil fuels, and hence they should be close to each other. Isnt 'E' more concise?
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by kvcpk » Sun Jun 13, 2010 9:01 pm
loi.fu.yogi wrote:How did you all eliminate 'E'? I thought, increase is because of burning fossil fuels, and hence they should be close to each other. Isnt 'E' more concise?
Is "Increased from" correct idiom? I am not sure.. "Increased By" should be the correct idiom I believe.
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by A.Kiran » Sun Jun 13, 2010 10:14 pm
In E there are 2 flaws.

1. The Sentence structure is wrong.

2. <That > refers to carbon dioxide or atmospheric carbon dioxide ? is it not ambiguous. ?
The original meaning of the sentence deals with the Atmospheric Carbon dioxide.



As KVCPK says, there is problem with idiom as well.
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