The defending attorney weakened the prosecution's arguments so much that, at
the end of the trial, the jury doubted that the victim had even existed.

(A) doubted that the victim had even existed
(B) doubts that the victim has even existed
(C) was in doubt as to the existence of the victim
(D) was doubtful concerning the victim's existence
(E) had doubts about the victim's even existing

Can some experts explain the Best Option?

OA A