假设用户正在执行UPDATE操作，此时用以下哪种方法可以关闭数据库（）

A.SHUTDOWN或SHUTDOWN IMMEDIATE或SHUTDOWN ABORT
B.SHUTDOWN或SHUTDOWN NORMAL或SHUTDOWN TRANSACTIONAL
C.SHUTDOWN NORMAL或SHUTDOWN ABORT或SHUTDOWN IMMEDIATE
D.SHUTDOWN或SHUTDOWN IMMEDIATE或SHUTDOWN TRANSACTIONAL
E.SHUTDOWN ABORT或SHUTDOWN IMMEDIATE或SHUTDOWN TRANSACTIONAL