gmat740 wrote:866
Tiny quantities of more than thirty rare gases, most of them industrial by-products, threaten to warm the Earth?s atmosphere even more rapidly than carbon dioxide during the next fifty years.

(A) to warm the Earth?s atmosphere even more rapidly than carbon dioxide during the next fifty years
(B) to warm the Earth?s atmosphere even more rapidly over the next fifty years than carbon dioxide will
(C) during the next fifty years to warm the Earth?s atmosphere even more rapidly than carbon dioxide
(D) a warming of the Earth?s atmosphere during the next fifty years even more rapid than carbon dioxide?s
(E) a warming of the Earth?s atmosphere even more rapid than carbon dioxide?s will be over the next fifty years

OA-BIMO-A

why is A wrong?

tomada wrote:I interpreted choice 'A' to mean that the thirty rare gases will warm the Earth's atmosphere faster than they will warm carbon dioxide. I think that the inclusion of "will" in choice 'B' creates the necessary parallelism.