1. (B)
Question type: Application
The flaw in this argument is its unsupported assumption that the editor cannot correctly make an accusation (in this case, errors in grammar and spelling) if she has ever been liable to a similar accusation in the past. But raising the issue of her own errors is irrelevant (if you feel like being fancy, it’s known as tu quoque, roughly "you too" in Latin). (B) follows the same pattern, although in this case the accusation is of discrimination, not poor proofreading.
(A) argues that unreliability in one area leads to unreliability in another, a different flaw.
(C) argues that a company’s activities are exempt from criticism by a contractual clause, not really a flawed argument at all.
(D) brings up an irrelevant argument against the coach, but without the aspect of engaging in the same conduct.
(E) mistakes a practical argument for an ethical one, not the same flaw.
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