Executive: In order to add to our profits, I was planning to promote and distribute herbal tinctures. However, some members of my advisory staff questioned the medical efficacy of such products. So I have consulted a variety of reliable medical publications, and these likewise claim that herbal tinctures are ineffective. Ttherefore, I must conclude that marketing such products would not produce the result I intended. The executive's reasoning most closely conforms to which one of the following generalizations? ['The promotion and distribution of a new line of products will not prove profitable if a number of reliable authorities declare them to be ineffective.', 'If a majority of reliable sources conclude that a particular substance is medically ineffective, then that substance almost certainly is medically ineffective.', 'To be reliable, a medical publication that evaluates consumer products must include at least some independent evidence.', 'Consulting reliable publications is not, by itself, a reliable basis for determining whether or not the promotion of a new line of products will be profitable.']