gre蛇皮题目 大家帮忙看下！

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Some psychologists have proposed the hypothesis that children in different cultures have different
psychologies, demonstrated, for example, by culture-specific tendencies for the children’s
behavior to be relatively self-assertive or obedient. However, that hypothesis is incorrect, since the
psychological mechanisms by which children acquire behavioral traits are identical for all
cultures.
In the argument, the author’s position and the position challenged by the author differ in the
criteria they use to distinguish different
A.behaviors
B.cultures
C.mechanisms
D.psychologies
E.traits

答案是D 看不懂！