An AIX system has a rootvg plus a separate volume group for database application. Which of the following commands are sued to backup the entire system?()
A、A.smitty mksysb (select additional volume group)
B、B.mkszfile && mksysb /dev/rmt0
C、C.smitty mksysb AND smitty savevg
D、D.smitty savevg (select additional volume group)