Which statement is correct when installing the camera cluster for the Cisco Telepresence System 1300?

A.
Four black plastic screws on top of the camera assembly secure the camera cover

B.
The cameras are setup correctly when images are centered, in focus on the display screens and the white balance is configured

C.
The camera cluster needs to be secured to the frame after leveling, screw down the camera screw in the back of the camera cluster to secure it to the frame

D.
To configure the camera property the camera cluster needs not be perfectly level, because you can level each camera separately