单选题
According to the passage, China is in a population dilemma in the sense that ______.
A、
it is difficult to carry out the family-planning policy
B、
Chinese population will continue to increase rapidly' in the near future
C、
birth-rate decreases but the percentage of old people increases
D、
more old people survive in the society
【正确答案】
C
【答案解析】
第四段说中国最终成功地控制了人口增长，但又引发了新问题Chinese population is aging rapidly，选项C出生率下降，而老龄人口比例增加，符合文意。
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