The system administrator wants to use a new jfslog /dev/fs1log with the filesystem /test/fs1 on the testvg volume group. The following commands were used to create the log and assign it to the filesystem： 
（1）mklv -t jfslog -y /dev/fs1log testvg 1  
（2）chfs -a log=/dev/fs1log /test/fs1  
While trying to mount the /test/fs1 filesystem the administrator received the error： 
"Cannot mount /dev/fs1lv on /test/fs1： A system call received a parameter that is not valid".
What step did the administrator miss that most likely caused the error？（）

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 XXX /usr commands.
D.Update /etc/filesystems with the desired size for /usr and reboot the system.

A.Umount the /development filesystem and remount it using the following command： mount -t jfs2 /development
B.Edit the /etc/filesystems file to change the type paramter to "jfs2" and change the log parameter to "jfs2log"
C.Backup the /development filesystem data， delete the JFS /development filesystem， create the new JFS2 /development filsystem， and restore the data to the /development filesystem
D.Backup the /development filesystem data， change the /development filesystem using the following command，chfs -t type=jfs2 /development.then， restore the data to the /development filesystem

A.lspv -l
B.lslv -p
C.lsps -a
D.lsvg -m