An administrator needs to apply a Technology Level update. During the preview install, the output indicates that there is insufficientspace in the /usr filesystem. Review of the root volume group indicates there are no available physical partitions, but the /test jfs2 filesystem is only 8% used. What is the most efficient method to use the available space in the /test filesystem to apply theupdate?（）
- AUse chfs to reduce the /test filesystem
- BUse cplv to copy the /test filesystem to a smaller logical volume
- CUse migratepv l to move the /test filesystem to a different volume group
- DBackup the /test filesystem, remove it, and recreate it with a smaller size