请教一道GWD！

suri122

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 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.

suri122

答案是A可是我感觉应该是E。请高人指点~~

cassierui

我这样想的哈 BCD你不纠结了 E我觉得有weaken的效果啊， 因为结论是说general 的比例要高于30%， 如果是E的话， 是说动物园工作人员不穿保护的gear， 言下之意是他们比起general population 更有可能得这个allergies， 所以是weaken 了conclusion.
所以就是A了 A应该是说那些患了严重allergies的工作人员都换工作了 也即是这部分人都变成了general population 的一部分了， 也就说明比例会高于30%