What are two reasons that a firmware upgrade might not be immediately activated on a server? (Choose two.)

A.
to provide a fail-safe in case the firmware upgrade is not installed correctly

B.
to allow the server to run normally during an upgrade

C.
to allow a specified amount of time before reboot using thecli reboot activate command

D.
to allow the operating system to be reinstalled

E.
to allow activation to take place when a reboot is selected