【单选题】The key ripple effect in real business cycle theory is the ________ decision and it depends on the ________. (实际商业周期理论中的关键涟漪效应是 _ _ _ _ _ _ _ _决定,它取决于 _ _ _ _ _ _ _ _。——中文由在线翻译而来,仅供参考)
A.
when-to-invest; real interest rate当对投资;实际利率
B.
when-to-work; real interest rate当向工作;实际利率
C.
what-to-save; nominal interest rate什么对保存;名义利率
D.
where-to-work; real wage rate其中,对工作;实际工资率