选择题：Misled people tend to think that using an animal in research is

题目内容：

Misled people tend to think that using an animal in research is

A. cruel but natural.

B. inhuman and unacceptable.

C. inevitable but vicious.

D. pointless and wasteful.

参考答案：

The idea that some groups of people may be more intelligent than others is one o

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