Which command can a system administrator use to verify that a tape is in backup format and is readable by the system？（）

A./opt/freeware/bin
B./usr/bin/freeware
C./var/freeware/bin
D./usr/sbin/freeware

A.savevg -mf /dev/rmt0 appvg
B.savevg -cvf /dev/rmt0 appvg
C.savevg -xvf /dev/rmt0 appvg
D.savevg -f /dev/rmt0 -V appvg