【单项选择题】
You are managing an ASM instance. You previously issued the following statements：  <br /> ALTER DISKGROUP dg1 DROP DISK disk2； <br /> ALTER DISKGROUP dg1 DROP DISK disk3； <br /> ALTER DISKGROUP dg1 DROP DISK disk5；  <br /> You want to cancel the disk drops that are pending for the DG1 disk group. <br /> Which statement should you issue？（）  <p> You are managing an ASM instance. You previously issued the following statements：  <br /> ALTER DISKGROUP dg1 DROP DISK disk2； <br /> ALTER DISKGROUP dg1 DROP DISK disk3； <br /> ALTER DISKGROUP dg1 DROP DISK disk5；  <br /> You&en
A、A. ALTER DISKGROUP dg1 UNDROP disk2，disk3，disk5
B、B. ALTER DISKGROUP dg1 UNDROP
C、C. ALTER DISKGROUP dg1 UNDROP DISKS
D、D. You cannot cancel the pending disk drops
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