单项选择题An administrator has mirrored the root volume group to a second disk, but bootlist is failing to correctly add the second disk. What is the likely cause of the problem?()
A.The administrator has failed to run 'bosboot -ad <2nd disk>' prior to the bootlist command.
B.The administrator has failed to run 'bootinfo -B <2nd disk>' prior to the bootlist command.
C.The administrator has failed to run 'mirrorvg -m rootvg <2nd disk>' prior to the bootlist command.
D.The administrator has failed to run 'bosboot -ad /dev/ipldevice <2nd disk>' prior to the bootlist command.