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题库 / GMATAdvanced-CR-12
Sasha: It must be healthy to follow a diet high in animal proteins and fats. Human beings undoubtedly evolved to thrive on such a diet, since our prehistoric ancestors ate large amounts of meat.
Jamal: But our ancestors also exerted themselves intensely in order to obtain this food, whereas most human beings today are much less physically active.
Jamal responds to Sasha by doing which of the following?
Refuting her statement about our prehistoric ancestors
Bringing forth a piece of information for the purpose of suggesting that she should qualify her main conclusion
Citing additional evidence that indirectly supports her conclusion and suggests a way to broaden it
Questioning whether her assumption about our prehistoric ancestors permits any conclusions about human evolution
Expressing doubts about whether most human beings today are as healthy as our prehistoric ancestors were
B. Jamal's response indicates that our prehistoric ancestors were far more active than we are. This suggests not that Sasha is incorrect in her statement, but that her conclusion would benefit from this qualification: a diet high in animal protein and fat is healthy when one engages in intense physical activity at a level that is higher than what is normal for modern human beings. Jamal is providing new pieces of Information which Sasha is missing.
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