agha79 wrote:
Why “B” is wrong? Is it because it is in “Passive” voice
heh. another instance in which liberal politics finds its way onto the gmat.
actually, most of the "science" purporting to show that humans cause global warming has been severely discredited, but we're not likely to see
that in a test sentence anytime soon.
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according to the context of the sentence, the phenomenon is caused not by the fossil fuels themselves, but by the burning of those fuels.
so choice (b) is incorrect, because it states that the phenomenon is caused by the fuels themselves.
to prove this, note that "burned by human beings" is a modifier, and that modifiers MUST be able to be removed without affecting the essential context of the sentence.
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and yes, the OG is very annoyingly inconsistent on declaring what is "awkward" and what is not.
this is certainly not the first instance in which a construction that has been declared "awkward" on one occasion is then found in another correct answer!
luckily, we at the manhattan gmat forums have a much better grip on which usage is awkward and which is not than, ironically, the answer key to the og itself.
