only A's language is not strong.

premise1:questions surrounding vice mayors tax return make mayor unfit for reelection

premise2:vice mayor was elected by public before mayor and the faulty tax return is accountants mistake and so it sheds no light on vice mayors performance.


B:stimulus doesnt say any thing about the ability to perform or not perform
C:"critics should not confuse"- there is no surity in the stimulus if mayor and vicemayor should be compared or not.

D. Critics have other reasons.- there are no other reasons mentioned.

E.vice-mayor is not at fault.- to strong. (we cannot conclude this.)

Thus A

Opponent : mayor should not be reelected:

Argument made by author is against this statement...
hence Choice A makes most of the sense

I will choose answer A