Manhatten例题求指导

heyuandi

Over the past decade, many companies have begun using 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 automated services should consider hiring women, rather than men, to interact with costomers 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 separated study indicated that 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.

C,D怎么理解？真心不理解C为啥说 tells us that customer patience is different between automated systems and live callers.  Therefore, we cannot conclude that we will experience greater patience by hiring more women in live systems

D为啥又OUT OF SCOPE呢

heyuandi

UP up up up upup

jackykangyi

本题很好理解啊。原文的逻辑链条是：客户听到女性machine voice比听到男性machine voice更耐心—>买不起machine的小公司应该请女性来接电话。
C说客户的patience只适用于machine，即小公司请男请女都无所谓，完美的攻击了上述逻辑链条的结论部分。
D只是说了一种preference，没说patience, 也没说男女，所以out of scope. 并且还只是some customer，不具备代表性