A、Four age-groups were compared. B、Age 16-24 had the steadiest labour force. C、Age 25- 44 had the greatest increase in labour fo

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问题

选项 A、Four age-groups were compared.
B、Age 16-24 had the steadiest labour force.
C、Age 25- 44 had the greatest increase in labour force.

答案C

解析
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