问题详情

It can be inferred that the labor force described in the passage is made up of ______.
A. persons whose jobs are not professional (专业的)
B. persons who work at both permanent (永久的) and full-time jobs
C. those over 16 years of age who are looking for work
D. about 60% of the country"s population请帮忙给出正确答案和分析，谢谢！