OA A
Why is A correct?
Couldn’t B be the answer?
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.
Hi Nikita,
You need to find an assumption on which the experts’ conclusion relies.
The experts’ conclusion: 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 substantially more than 30 %
Why the conclusion? Because in a survey of current employees in major zoos, about 30 percent had animal-induced allergies
You need to find something that connects the above 2. Option A says a zoo employee who develops a serious animal-induced allergy is very likely to switch to some other occupation. If this is the case, then the zoo employee who has already developed allergy becomes part of the general population and adds to the number of people with allergy. Hence A is the assumption the experts are making in saying that the percentage among general population is more than 30.
B is incorrect because the source of allergy doesn’t matter. Regardless of whether the zoo employee gets affected by home pets or by zoo animals, he develops allergy. However in both cases, the zoo employee is counted as a zoo employee only and not as a member of general population and also he/she is counted only once and hence option B doesn’t explain how the percentage is higher in case of general population.