How do you know that all blades on the Cisco TelePresence MSE 8000 have booted correctly?

How do you know that all blades on the Cisco TelePresence MSE 8000 have booted
correctly?

A.
The logo will light up.

B.
The lights on the fan tray will turn green.

C.
The light in the supervisor blade will turn green.

D.
Alarm lights come on.