If the status of the access which collected by the network management is always open, it can be checked by (). (Multiple choice)

If the status of the access which collected by the network management is always open, it can be checked by (). (Multiple choice)
A . Check if the door of access monitoring is closed
B . Check if the access control actuator and the door magnetic lock wiring are normal.
C . Check if the suction plate angle and tightness on the door are suitable
D . Check AC actuator wiring

Answer: ABC