单选题 Which of the following employment measures is most closely related to the level of real GDP?

A. Labor force participation ratio.
B. Number of employed.
C. Aggregate hours.

【正确答案】 C

【答案解析】Aggregate hours measure the total amount of labor performed in the economy. This measure captures changes in the number of people working and the effects of part-time work and overtime. Aggregate hours are related more closely to the level of real GDP than any of the other employment measures listed.