一个C/S结构的数据库应用系统中，前台应用程序与后台数据库连接的标准接口是______。

A.RESTORE DATABASE MyDB FROM bk WITH FILE=1，NORECOVERY
RESTORE DATABASE MyDB FROM bk WITH FILE=3，NORECOVERY
RESTORE LOG MyDB FROM bk WITH FILE=4
B.RESTORE DATABASE MyDB FROM bk WITH FILE=1，NORECOVERY
RESTORE LOG MyDB FROM bk WITH FILE=2，NORECOVERY
RESTORE DATABASE MyDB FROM bk WITH FILE=3，NORECOVERY
RESTORE LOG MyDB FROM bk WITH FILE=4
C.RESTORE DATABASE MyDB FROM bk WITH FILE=1，NORECOVERY
RESTORE LOG MyDB FROM bk WITH FILE=2
RESTORE DATABASE MyDB FROM bk WITH FILE=3，NORECOVERY
RESTORE LOG MyDB FROM bk WITH FILE=4
D.RESTORE DATABASE MyDB FROM bk WITH FILE=1
RESTORE LOG MyDB FROM bk WITH FILE=2
RESTORE DATABASE MyDB FROM bk WITH FILE=3
RESTORE LOG MyDB FROM bk WITH FILE=4