—It is strange that Dave didn’t respond________any of my e­mails.

—Something must have happened to him.

A．on

B．with

C．for

D．to

设选取的基准收益率为I_c，如果某投资方案在财务上可行，则有：

A．财务净现值小于零，财务内部收益率大于I_c
B．财务净现值小于零，财务内部收益率小于I_c
C．财务净现值不小于零，财务内部收益率不小于I_c
D．财务净现值不小于零，财务内部收益率小于I_c