Answer: B) No fallacy.
Step-by-step explanation:
No fallacy is the situation in which no faulty or false meaning, reasoning or factors are included in formation of argument. No mistaken belief is involved .
According to the question, no fallacy is the request that is made for Clark's side as he has not made up any false statement rather it is his brain damage condition that makes him forget things.Thus, testimony should be cancelled.
Other options are incorrect because appeal to ignorance, pity appeal,unqualified authority appeal and Argument against the person, circumstantial is not depicted through scenario. Thus, the correct option is option(B).