What is the supported process to correct filesystem corruption which prevents a normal boot?

A.
Boot the system into a maintenance shell Access the volume group and start a shell before
mounting the file systems Run fsck on the rootvg filesystems Exit shell Sync and reboot

B.
Boot the system into a maintenance shell Access the volume group and start a shell Run fsck
on the rooWg filesystems Exit shell Sync and reboot

C.
Boot the system into a restricted shell Access the volume group and start a shell before
mounting the file systems Run fsck on the rootvg filesystems Exit shell Sync and reboot

D.
Boot the system into a restricted shell Access the volume group and start a shell Run fsck on
the rootvg filesystems Exit shell Sync and reboot

Explanation: