单项选择题

The tone of this article would best be described as ______.

A．informative
B．critical
C．exploratory
D．perplexed
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单项选择题
According to the text, the problem that the scale of the study of human nature brought is ______.
A．that it is mysterious
B．insights lead to more questions and mystery
C．it is almost always used for the wrong purposes
D．there are too many competing theories
单项选择题
Scientists are responsible for people who hold harmful beliefs about human nature because ______.
A．the theories of scientists are used as justification for such harmful beliefs
B．only through science can these people be refuted
C．they have an obligation to correct their mistakes
D．scientists are the ones who know the true nature of humankind
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