As a film star she was a success, but as a wife she was _____ failure, so their marriage ended in _____ failure. [ ]

A. /; /

B. /; a

C. a; a

D. a; /

市场调查过程的最后一个步骤是（）。

A.分析数据

B.准备并提交报告

C.执行意见和建议

D.收集数据