150. Most of the purported health benefits of tea comes from antioxidants—compounds also found in beta carotene, vitamin E, and vitamin C that inhibit the formation of plaque along the body's blood vessels.

A. comes from antioxidants—compounds also found in beta carotene, vitamin E, and vitamin C that

B. comes from antioxidants—compounds that are also found in beta carotene, vitamin E, and vitamin C, and they

C. come from antioxidants—compounds also found in beta carotene, vitamin E, and vitamin C, and

D. come from antioxidants—compounds that are also found in beta carotene, vitamin E, and vitamin C and that

E. come from antioxidants—compounds also found in beta carotene, vitamin E, and vitamin C, and they

A: comes用复数；that修饰词不对

B: 同上；and they没有平行对象

C: and inhibit 和found不平行

D: correct

E: and they没有平行

注意：

1、most of主谓一致跟后面的名词而定

2、and做为考点，一定会有平行

还是不太明白D为什么是最好的选项...请哪位高人教教我吧...

from the singular and plural form, u can directly delete A and B.

then look at 

C. come from antioxidants—compounds also found in beta carotene, vitamin E, and vitamin C, and

after compounds, there seems something missing like "that".

D. come from antioxidants—compounds that are also found in beta carotene, vitamin E, and vitamin C and that

that.. and that.. is a prefer form in GMAT, at least, from what i read before, once u see that.. and that use properly, its the answer

E. come from antioxidants—compounds also found in beta carotene, vitamin E, and vitamin C, and they

need that after compounds, "they" is not efficient as "and that".

my personal opinion, ur correction is highly appreciate~