Examine the following ALTER command: SQL> ALTER DISKGROUP dgroup1 UNDROP DISKS; What is the purpose of the command?()
A.It cancels all pending disk drops within the disk group. B.It restores disks that are being dropped as the result of a DROP DISKGROUP operation C.It mounts disks in the disk group for which the drop-disk operation has already been co pleted D.It restores all the dropped disks in the disk group for which the drop-disk operation has already been completed E.It adds previously dropped disks back into the disk group