The studies must have been faulty because the vaccine is worthless
(A) gives a reasoning for Dr. A's argument, that's not what we are looking for
(B) "recommends" is moderate language... Dr. A uses a strong language
(C) X is faulty, so Y is worthless (ORIGINAL ARGUMENT)
X (these tennis balls) is best, so Y (not these tennis balls) is worse
(D) same as B to me
(E) X leads to Y, so Y leads to Z... completely unparallel
One more C.
The path is long, but self-surrender makes it short;
the way is difficult, but perfect trust makes it easy.