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 groupB、It restores disks that are being dropped as the result of a DROP DISKGROUP ope
题目
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 completed
- 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