再po一题gwd语法，希望大家帮忙

Discussion of greenhouse effects has usually focused on whether the

Earth would warm and by how much, but climatologists have indicated all

along that the most obvious effects, and those that would have the larg-

est impact on people, would be extremes of temperature, precipitation,

and storminess.

A.     the most obvious effects, and those that would have the largest

impact on people, would be extremes of temperature,

precipitation, and storminess

B.     the effects that are the most obvious ones, extremes of temper-

ature, precipitation, and storminess, would be those impacting

the most on people

C.     those effects to have the largest impact on people, extremes of

temperature, precipitation, and storminess, are what are the

most obvious effects

D.     extremes of temperature, precipitation, and storminess, the most

obvious effects, that they would have the largest impact on people

E.      extremes of temperature, precipitation, and storminess, which are

the most obvious effects, are those to impact the most on people

The answer is A, but what's the problem with E? thx!