A-A+
Which of the following can account for a large
问题详情
Which of the following can account for a large part of the high American mobility rate？
A．Divorce and morality.
B．Expansion of industry and commerce.
C．Changes in the labour force.
D．None of the above.
参考答案
正确答案：D
解析：本题为要点推论题，由第四段的末句以及文章的最后一句话可以排除选项A与选项C；而根据第二段第三句话，选项B亦可被排除，所以只有选项D为正确答案。
