GWD-17-22

22. GWD26-Q22

People who have spent a lot of time in contact with animals often develop animal-induced allergies, some of them quite serious. In a survey of current employees in major zoos, about 30 percent had animal-induced allergies. Based on this sample, experts conclude that among members of the general population who have spent a similarly large amount of time in close contact with animals, the percentage with animal-induced allergies is not 30 percent but substantially大体上 more.

Which of the following, if true, provides the strongest grounds for the experts’ conclusion?

A.      A zoo employee who develops a serious animal-induced allergy is very likely to switch to some other occupation.

B.       A zoo employee is more likely than a person in the general population to keep one or more animal pets at home

C.      The percentage of the general population whose level of exposure to animals matches that of a zoo employee is quite small.

D.      Exposure to domestic pets is, on the whole, less likely to cause animal-induced allergy than exposure to many of the animals kept in zoos.

E.       Zoo employees seldom wear protective gear when they handle animals in their care.

那位nn可以帮忙说明一下

我觉得c是不对的，如果认为C成立，那么必定无意识地加入了一个条件：现在的普通人群的allergic率已经非常接近或已经达到30%（所以当普通人群与动物接触更长时间后，allergic率还会更多），没有这个条件题设条件就不能成立；

显然题中并没有提到这个条件，所以只有A最strong地支持了这个ms与条件相反的结论：有很多serious allergy得人转行了以后降低了本来比30%要高的allergic率，说明了正常情况下（这些人不转行）〉30%