单项选择题
维护个人利益是个人行为的唯一动机。因此，维护个人利益是影响个人行为的主要因素。
以下哪项如果为真，最能削弱题干的论证？（）
A．维护个人利益是否是个人行为的唯一动机，值得讨论。
B．有时动机不能成为影响个人行为的主要因素。
C．个人利益之间有冲突，也有一致。
D．维护个人利益的行为也能有利于公共利益。
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某商场失窃。员工甲、乙、丙、丁涉嫌被拘审。甲说：“是丙作的案。”乙说：“我和甲、丁三人中至少有一个作案。”丙说：“我没有作案。”丁说：“我们四人都没作案。”如果四人中只有一个说真话，则可推出以下哪项结论？（）
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All
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