Is ___ woman in red your mother?

–Yes. She is ____ teacher and works in our school.

A．the, /

B．a, the

C．the, a

D．a, a

（）是一个专门存储移动用户信息的数据库，记录有用户的位臵信息，MSISDN，IMSI永久性用户信息等。

A、HLR

B、VLR

C、MSC

D、BSC