health benefits !

[gmat_perfect]

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

My reasoning:

A and B=> Are out because benefits is a plural noun.

E=> They is ambiguous. OUT.

I am torn between C and D.

Which one is correct?

What is the wrong in the option C? Please specify and explain the reason.

Thanks.

[kvcpk]

"that" is required as specified in option D.

What if we do not have "that"?

We are introducing the definition of Antioxidants after the symbol "- -"
Without "that", the definition would look like:
compounds also found in beta carotene, vitamin E, and vitamin C, and inhibit the formation of plaque along the body's blood vessels.

Does this look meaningful? NO. Moreover, What is "inhibit" referring to?

With use of "that", we are clearly referring to compounds everytime.
compounds that are also found in beta carotene, vitamin E, and vitamin C and that inhibit the formation of plaque along the body's blood vessels.

"that" is used to introduce a modifier that is used to reflect back to modified noun "compounds"

Hope this helps!!

[gmat_perfect]

"that" is required as specified in option D.

What if we do not have "that"?

We are introducing the definition of Antioxidants after the symbol "- -"
Without "that", the definition would look like:
compounds also found in beta carotene, vitamin E, and vitamin C, and inhibit the formation of plaque along the body's blood vessels.

Does this look meaningful? NO. Moreover, What is "inhibit" referring to?

With use of "that", we are clearly referring to compounds everytime.
compounds that are also found in beta carotene, vitamin E, and vitamin C and that inhibit the formation of plaque along the body's blood vessels.

"that" is used to introduce a modifier that is used to reflect back to modified noun "compounds"

Hope this helps!!

Good catch. Thanks.

I was worried about the use of and inhibit in the option C.

And inhibit creates what sort of problem?
Thanks.

[kvcpk]

"that" is required as specified in option D.

What if we do not have "that"?

We are introducing the definition of Antioxidants after the symbol "- -"
Without "that", the definition would look like:
compounds also found in beta carotene, vitamin E, and vitamin C, and inhibit the formation of plaque along the body's blood vessels.

Does this look meaningful? NO. Moreover, What is "inhibit" referring to?

With use of "that", we are clearly referring to compounds everytime.
compounds that are also found in beta carotene, vitamin E, and vitamin C and that inhibit the formation of plaque along the body's blood vessels.

"that" is used to introduce a modifier that is used to reflect back to modified noun "compounds"

Hope this helps!!

Good catch. Thanks.

I was worried about the use of and inhibit in the option C.

And inhibit creates what sort of problem?
Thanks.

Understand it this way:

If you just say "and inhibit", it is not clear on what it is referring back to. Compounds/antioxidants. Moreover it looks awkward. So, to make it refer to compounds we need to use "that".
Now, because we are using "that" after the "and", we need to use "that" after "compounds" also to maintain parallelism.
This makes it look simple.