stevegt
93. Those skeptical of the extent of global warming argue that short-term temperature data are an inadequate means of predicting long-term trends and point out that the scientific community remains divided
on whether significant warming will occur and what impact will it have if it does.A. on whether significant warming will occur and what impact will it have if it does.
B. on whether warming that occurs will be significant and the impact it would have
C. as to whether significant warming will occur or the impact it would have if it did
D. over whether there will be significant warming or the impact it will have
E. over whether significant warming will occur and what impact it would have
A: and what impact will it have if it does - wordy
B: Not totally sure, but I don't think on whether is the correct idiom
C: as to whether sounds good, then... "will occur or the impact" changes the meaning of the sentence
D. will have changes the meaning, its not sure if it (globabl warming) "will occur"
E: correct idiom over whether. it would have fixes the wordy phrase will it have if it does, but does not change the meaning.
Again, I think over whether is the correct idiom...