When asked how he liked his job, he said he was happy _____ he was. [ ]

A. what

B. who

C. where

D. how

企业使用或者销售存货的实际成本，可选择的具体确定方法是（）

A.后进先出法

B.先进先出法

C.加权平均法

D.个别计价法