A Call Center Supervisor Is Trying to Initiate an Emergency

A call center supervisor is trying to initiate an emergency condition by using FAC. After entering the required FAC, a busy signal is returned. Which three reasons are causing this problem? (Choose three.)

A) The variable associated with emergency is not defined.
B) The COS-group of the telephone set Console Permission disabled.
C) The COS-group of the telephone set has Priority Calling disabled.
D) The FAC Vector Variable(VV1-9) is not defined.
E) The VDN variable V1-9 is not set.