In order to strengthen his arguments, George ______ respectable social scientists who agree with him.

【正确答案】 C

【答案解析】 动词词义辨析。quote“引用……的话，引证”；recite“背诵，朗诵”；confirm“证实，确认”；convince“使信服，确信”。根据句中arguments，George应该是引用respectable social scientists。故答案为C。