单选题While using the smit install_remove menus to remove some filesets on an AIX 5.3 server， a system administrator notices the /usr filesystem is now unnecessarily large. Which of the following actions will reduce the size of the /usr filesystem （）ABackup， unmount， remove， recreate and restore the filesystem.BBoot from mksysb tape and select Shrink filesystems on restore.CUnmount， run defragfs /usr and the reducefs -size n /usr commands.DUpdate the /image.data file with the desired size for /usr and reboot the system.
单选题
While using the smit install_remove menus to remove some filesets on an AIX 5.3 server， a system administrator notices the /usr filesystem is now unnecessarily large. Which of the following actions will reduce the size of the /usr filesystem （）
A
Backup， unmount， remove， recreate and restore the filesystem.
B
Boot from mksysb tape and select Shrink filesystems on restore.
C
Unmount， run defragfs /usr and the reducefs -size n /usr commands.
D
Update the /image.data file with the desired size for /usr and reboot the system.
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