A corporate file server must be shut down for an upgrade of an internal tape drive. Which sequence of steps should be performed before the upgrade?

A.
notify users before shutdown; shut down applications; shut down the peripherals; shut down the server

B.
perform a backup; notify users before shutdown; shut down the peripherals; shut down the server

C.
have all users log off the server; shut down all applications; back up the server; shut down the server; shut down the peripherals

D.
perform a backup; notify users before shutdown; shut down the server and the peripherals together