76. Gall's hypothesis of there being different mental functions localized in different parts of the brain is widely accepted today.
(A) of there being different mental functions localized in different parts of the brain is widely accepted today
(B) of different mental functions that are localized in different parts of the brain is widely accepted today
(C) that different mental functions are localized in different parts of the brain is widely accepted today
(D) which is that there are different mental functions localized in different parts of the brain is widely accepted today
(E) which is widely accepted today is that there are different mental functions localized in different parts of the brain
Choices D and E are awkward and wordy, and both use which where that would be the preferred pronoun for introducing a clause that states Gall's point.
这里ETS的解释是that引导的定语从句优于which，这是什么语法现象？ | 
