IMO C

imo:C

Looks like C to me.

OA - C.

Posted: Wed Aug 20, 2008 4:17 am Post subject: Choosing the best amongst wrong options !
The global-warming effect of ocean white caps are one of the many aspects of the ocean environment that are not yet incorporated in any detail into the computer models used for predicting how rising greenhouse gas concentrations could affect climate.

A. The global-warming effect of ocean white caps are one of the many aspects of the ocean environment that are not yet incorporated in any detail into the computer models used for predicting

global-warming effect of ocean white caps awkward
for predicting..wrong idiom

B. The effect on global warming of ocean white caps are one of the many aspects of the ocean environment not yet incorporated in any detail into computer models, which they use to predict

they --- who

C. The effect of ocean white caps on global warming is one of the many aspects of the ocean environment that are not yet incorporated in any detail into the computer models used to predict

Correct

D. That ocean white caps have an effect on global warming is one of the many aspects of the ocean environment not yet having been incorporated in any detail into the computer models that are used for predicting

inverted subject verb clause...not preferable on gmat

E. That ocean white caps have an effect on global warming is one of the many aspects of the ocean environment not yet being incorporated in any detail into computer models, which they use to predict

inverted subject verb clause...not preferable on gmat
Use of being..... wordy

C