— I called you at ten, but there was no reply.

—Oh, that was probably when I ________ a shower.

A．am taking

B．took

C．were to take

D．was taking

某公司员工tea已提出辞职申请，将在9月底，既2008年9月30号，合同到期后不再续约，于是网络管理员要指定该用户帐户的到期日期，以免到时忘记注销该用户引起不必要的麻烦。则网络管理员要执行的命令是（）。

A、usermod -e 09/30/2008 tea

B、chmod -e 09/30/2008 tea

C、userdel -r tea

D、usermod -f 09/30/2008 tea