It was not until she arrived at the classroom she realized she had forgotten her coursebook.

A．and she realized

B．which she realized

C．then she realized

D．that she realized

平行结转分步法的适用情况是（）。

A.半成品对外销售

B.半成品不对外销售

C.管理上不要求提供各步骤半成品资料

D.半成品种类较多，逐步结转半成品成本工作量较大

E.管理上要求提供各生产步骤半成品成本资料