What is causing the Cisco TelePresence Touch 12 to show Project/LCD in error?

A.
The HDMI cable is not connected between the LCU and the Active Collaboration data display.

B.
The serial cable is not connected between the LCU and the Active Collaboration data display.

C.
There is a cabling problem with the PS1 codec to the Active Collaboration data display.

D.
The Active Collaboration data display is powered off.

Explanation: