依据杜邦分析法，当权益乘数一定时，影响资产净利率的指标有（）。

A.销售净利率

B.资产负债率

C.资产周转率

D.产权比率

Only when total production expands faster than the rate of labor force growth plus the rate of productivity increase and minus the rate with average annual hours fall so does the unemployment rate.

A. at which average annual hours fall does the umemployment rate fall.
B. which average annual hours fall so does the umemployment rate.
C. in which average annual hours fall and so does the umemployment.
D. which average annual hours fall does the umemployment rate fall.