Which method can you use to accomplish this?

You want to change the runlevel of a Linux machine from 4 to 5 dynamically. Which method can you use to accomplish this?

A.
Specify the runlevel in the init command.

B.
Specify the runlevel in the /etc/inittab file.

C.
Specify the runlevel in the /etc/rc.d/rc.local file.

D.
Specify the runlevel while booting using Grand Unified Bootloader (GRUB).