How can a directory&

How can a directory be excluded from a mksysb backup（）

• APut an entry in the /etc/exclude.rootvg file.
• BPut an entry in the /etc/mksysb.exclude file.
• CRemove the directory’s entry from the mksysb /image.data file.
• DRemove the directory’s entry from the /var/adm/ras/bosinst.data file.