（单选题）
How can you reverse the effects of an ALTER DISKGROUP ... DROP DISK command if it has already completed？（）
A Issue the ALTER DISKGROUP ... ADD DISK command.
B Issue the ALTER DISKGROUP ... UNDROP DISKS command.P.... DROP DISK CANCEL command.
C Issue the ALTER DISKGROU
D Retrieve the disk from the Recycle Bin after the operation completes.
正确答案
答案解析
略
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