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.