白勇怎么自相矛盾啊！OG求教！！！！！

Despite no proof that the consumption of any particular foods reverse hardening of the arteries, studies indicate that refraining from eating certain foods could help reverse blockage of coronary arteries, the blood vessels that feed the heart.
(A) Despite no proof that the consumption of any particular foods reverse hardening of the arteries, studies indicate that refraining from eating certain foods could
(B) Despite no foods having been proved to reverse hardening of the arteries when consumed, studies indicate that refraining from eating certain foods can
(C) Although the consumption of no particular foods have been proved to reverse hardening of the arteries, studies indicate that to refrain from eating certain foods could
(D) Although not proved that the consumption of any foods reverse hardening of the arteries, studies indicate that refraining from eating certain foods can
(E) Although it has not been proved that the consumption of any particular food will reverse hardening of the arteries, studies indicate that refraining from eating certain foods can

A中could时态错误，indicate表示预测，将来时，红字部分不够简洁且时态错误，根据语意是完成时
B中having done修饰food做定语，having done做定语错误
C中could时态错误
D中从句无主语
E正确

GMAT中很多定理其实一开始用着挺好的，但是用着用着就会发现很多矛盾，不要迷信定理啦，根据句意来

- -明明是助动词……