单选题
The passage indicates that the conditions that led to overcrowded roads also brought about ______.
A、
more attractive living conditions for many people
B、
a healthier younger generation
C、
greater occupational opportunities
D、
the population explosion
【正确答案】
A
【答案解析】
[解析] 由第二段中的“success in getting people out of tenements of the 19th．．．jams”可知答案。
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