It was a serious mistake, ______ caused by carelessness.

A．which I think was

B．which I think it was

C．I think which was

D．that I think it was

库管员工作内容有（）。

A.提前做好所负责区域的卫生及仓储条件控制

B.负责餐厅酒水及所需物品的领取、发放及统计核对工作

C.负责提供当餐的酒水情况，并做好餐后酒水销售统计工作

D.做好每月领用物品的汇总统计工作

E.控制仓库物品的储备，杜绝短缺、积压、过期