Question ID:PT29 S4 Q18 Passage:All actions are motivated by self-interest, since any action that is apparently altruistic can be described in terms of self-interest. For example, helping someone can be described in terms of self-interest:  the motivation is hope for a reward or other personal benefit to be bestowed as a result of the helping action. Stem:Which one of the following most accurately describes an error in the argument's reasoning? Correct Answer Choice:BChoice A:The term "self-interest" is allowed to shift in meaning over the course of the argument. Choice B:The argument takes evidence showing merely that its conclusion could be true to constitute evidence showing that the conclusion is in fact true. Choice C:The argument does not explain what is meant by "reward" and "personal benefit." Choice D:The argument ignores the possibility that what is taken to be necessary for a certain interest to be a motivation actually suffices to show that that interest is a motivation. Choice E:The argument depends for its appeal only on the emotional content of the example cited.