Sentence Correction

According to a study published in The New England Journal of Medicine, aspirin prevents blood clots just as well as a commonly used and more expensive blood-thinning drug does.

(A) prevents blood clots just as well as a commonly used and more expensive blood-thinning drug does
(B) prevents blood clots just as well as does a commonly used and a more expensive blood-thinning drug
(C) prevents blood clots just as well as will a commonly used and more expensive blood-thinning drug
(D) works just as well as a commonly used and more expensive blood-thinning drug at the prevention of blood clots
(E) works just as well as does a commonly used blood-thinning drug, which is also more expensive, at preventing blood clots


How I have reached to the answer:

D and E have used different verbs, and doing this changes the intended meaning of the sentence. works and prevents are not same in sense of meaning. So, D and E are out.

B is faulty for subject verb agreement.
prevents blood clots just as well as does a commonly used and a more expensive blood-thinning drug

=> I have a cheap and an user friendly book. Here, I am talking about two books. One of them is cheap and another one is user friendly.

The same has been done in the option B.

Two drugs-commonly used and another one is more expensive-have been meant. So, the verb should have been "DO".

C=> Will is not parallel to prevents.

Any more thought on it?

Thanks.

OA is "A", right?

Answer is A. Please refer to the below thread to get more insight into these kind of issues...good question..

https://www.manhattangmat.com/forums/stu ... t8688.html

Is this question taken from an OG?