单项选择题

After mirroring rootvg, a system administrator wants to……

After mirroring rootvg, a system administrator wants to validate that the system will boot correctly.
Which of the following tasks must be performed before changing the boot order?（）

A.Run a bosboot -a command
B.Mirror the hd5 on the two disks
C.Set up another service mode bootlist
D.Check the disks using a lsvg -p rootvg command

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