While configuring a lighting system, an integrator discovers two of the ten light switches are not responding as expected to the control commands. Which of the following choices would be the logical FIRST step in diagnosing this problem?
A.
Verify the communication layer to the switches.
B.
Replace the serial cable to the controller.
C.
Verify the electrical circuit is utilizing a 20 amp breaker.
D.
Verify RG-6 wire mapping to the switches.