Political candidates' speeches are loaded with promises and with expressions of good intention, but one must not forget that the politicians' purpose in giving these speeches is to get themselves elected. Clearly, then, these speeches are selfishly motivated and the promises made in them are unreliable. Which one of the following most accurately describes a flaw in the argument above? ['The argument presumes, without providing justification, that promises made for selfish reasons are never kept.', 'The argument overlooks the fact that a candidate who makes promises for selfish reasons may nonetheless be worthy of the office for which he or she is running.', "The argument presumes, without providing justification, that if a person's promise is not selfishly motivated then that promise is reliable.", 'The argument overlooks the fact that a promise need not be unreliable just because the person who made it had an ulterior motive for doing so.']