GMAT-27-38请教求解思路

sv2000

People who have spent a lot of time in contact with animals often develop animal-induced allergies, a significant percentage of which are quite serious.  In a survey of current employees in major zoos, about 30 percent had animal-induced allergies.  However, a zoo employee who develops a serious animal-induced allergy is very likely to switch to some other occupation. Which of the following hypotheses receives the strongest support from the information given?

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yangsh

B? not sure, need more help.

deanjiang

E

跟动物呆的时间一样，普通人概率高。（由于zoo中得病的人被转走，所以调查的30％是偏低的）

beibeizhu

同意楼上的gg.选E

这题是某一题的变体.

howardwang

E是对的。

因为动物园的感染过敏者移走到其他岗位，还有30%。

sv2000

谢谢讨论，给出答案是B。不过这题明显应该选E，只怪当初脑袋糊涂呀。