A customer complains that neither powered serial port on their HP rp5700 POS System is supplying
power. What is the most likely cause?

A.
The customer did not set the pin jumpers to switch the serial ports to powered mode.

B.
The customer did not order the powered serial port add-in card with the system.

C.
The serial port cable is disengaged from the connector on the system board.

D.
The system is not connected to an AC power source.