Which of the following commands will fix error “cannot find the root filesystem” by pointing the kernel image to the new root partition?

A server was rebuilt using a full system backup but with a different disk setup. The kernel won’t boot, complaining it cannot find the root filesystem. Which of the following commands will fix this error by pointing the kernel image to the new root partition?

A.
mkbootdisk

B.
tune2fs

C.
rdev

D.
grub-install

E.
fdisk