I watched the man for a long time and wanted to know _______. [ ]

A. whether I have seen him before

B. where I had seen him before

C. that I had seen him before

D. when did I see him

在业务处理过程中，（）应重点审核会计核算业务的正确性、有效性、规范性。

A、柜员

B、库管员

C、事中监督

D、事后监督