单选题
The factor which does NOT influence the size of the workforce is ______.
A、
the size of population
B、
age distribution of the population
C、
national economy
D、
natural increase
【正确答案】
C
【答案解析】
解析：由第二段可知影响劳动力规模的因素有 the size of population, age distribution of the population及natural increase。
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