单项选择题

A.imp system/sys fromuser=secnet touser=secnet file=secnet.dmp ignore=y log={日志文件名.log buffer=1024000
B.imp secnet/secnet file=secnet.dmp fromuser=secnet touser=secnet IGNORE=y
C.imp system/sys fromuser=fenghuo touser=secnet file=secnet.dmp ignore=y log={日志文件名.log buffer=1024000
D.imp secnet/secnet file=secnet.dmp fromuser=fenghuo touser=secnet IGNORE=y