Faden: Most of our exercise machines are still in use after one year. A recent survey of our customers shows this. Greenwall: But many of those customers could easily be lying because they are too embarrassed to admit that they don' t exercise anymore. Faden: You have no way of showing that customers were lying. Your objection is absurd. Which one of the following most accurately describes a flaw in the reasoning above? ['Faden presumes, without providing justification, that the more conclusive the evidence is for a claim, the less believable the claim becomes.', 'Faden presumes, without providing justification, that the evidence for a claim has not been undermined unless that evidence has been proven false.', 'Greenwall ignores the possibility that some people stopped using the equipment but were not embarrassed about it.', 'Greenwall presumes, without giving justification, that most people are dishonest about their personal habits.']