Many companies use automated telephone services: Callers hear a machine-generated voice and are able to select options using the numbers on the telephone keypad. Research shows that callers are more patient when the machine-generated voice is that of a woman. Thus, smaller companies that cannot afford an automated service should consider hiring women, rather than men, to interact with customers by phone.
Which of the following, if true, would be most damaging to the conclusion above?
(A) Automated telephone services are becoming cheaper and cheaper every year.
(B) Patient customers tend to order more products and return fewer products than impatient customers.
(C) A separate study indicated that the extra patience exhibited by callers is limited to interactions with an automated system.
(D) Some customers prefer automated systems to talking with a live person.
(E) On average, callers are only slightly more patient when interacting with a female voice, rather than a male voice, in an automated telephone system