单选题
From the factual data in the passage, we know that by the year 2020______.
A、
the population growth rates in Thailand will have increased
B、
there will be a disproportionate number of older people
C、
US population growth rate will stabilize
D、
the average age of Europeans will be 35
【正确答案】
B
【答案解析】
推理题。从文章的最后一段分析可以得出，人口的老龄化问题将会越来越突出，所以人口的老少比例将会严重失调，故B为正确答案。
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