单选题
Which sentence best expresses the main idea of Paragraph 2?
A、
The first sentence.
B、
The second sentence and the third sentence.
C、
The fourth sentence.
D、
The last sentence.
【正确答案】
C
【答案解析】
解析：从文章第二段看，第四句“The counterculture presented men and women with new role choices”是其中心句。
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