请教：一道findjuhl没有给出答案的prep SC题！

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

Please kindly help!!!
        

我选A，平行关系

A应该是what impact will it... or what impact it will??

Many thanks

嗯，mm是对的。应该是what impact it will 。这样看起来，应该是E了。

这里的would是不是表示不确定信。。呼呼，也请nn们过来一起看看吧

E is the key.

E. over whether significant warming will occur and what impact it would have

考点是条件句，也即虚拟语气，OG中多次出现，关键是would 表示还没真实发生。

另外的一个考点是divide over。

I think.