Oracle数据库中，初始化参数AUDIT_TRAIL为静态参数，使用以下（ ）命令可以修改其参数值。
A.ALTER SYSTEM SET AUDIT_TRAIL=DB
B.ALTER SYSTEM SET AUDIT_TRAIL=DB DEFERRED
C.ALTER SESSION SET AUDIT_TRAIL=DB
D.ALTER SYSTEM SET AUDIT_TRAIL=DB SCOPE=SPFILE
正确答案是D