💥EXCEPTIONABLE = offensive:
He was criticized for his *exceptionable* comments.

💥EXCEPTIONAL = outstanding:
My essay is *exceptional*.

Answer: (B) overwhelming

Please don't assume that passives always need "by". I know your books might tell you this,but you should know that all verbs in the passive voice are not exclusively followed by "BY".

A few examples in which agents, in Passive Voice, are positioned after some other prepositions, like about, at,–‘to’, ‘with’, etc. instead of the preposition –‘by’.
e.g.:-
Active
Passive
(i)
I know him.
He is known to me.
(ii)
He annoyed me much.
I was much annoyed with him.
(iii)
My frequent Visit annoys him.
He is annoyed at my frequent visit.
(iv)
His carelessness annoys me much.
I am annoyed about his carelessness.
(v)
The precocity of the child astonished me.
I was astonished at/by the precocity of the child.
(vi)
A large number of trees surround the village.
The village is surrounded with/by a large number of trees.