It was after he had worked on the project for months _____ he found how to solve the problem efficiently. [ ]

A. that

B. when

C. until

D. as

自助设备钞箱取出的现金，经清点无误后，应在ABIS系统中经（）授权从自助设备调出相应现金到柜员现金箱，然后进行现金实物的移交工作。

A.营业机构主任

B.会计主管

C.复核员

D.现金保管员