A: This statement is not logical because it makes the person look bad before he makes his argument.
Explanation:
The best description of the statement is expressed in option A, which explains that it is not logical, only a personal opinion and accusation that might be true or not, but surely it <em>taints</em> the opponent's <em>reputation</em> before he or she has a chance to manifest their argument. The best way to prove their views as being wrong should be <em>debating</em>.
