Technician A says that power line carrier (PLC) permits multiplexing to take place between a trailer and the tractor data bus on a non-dedicated wire. Technician B says that PLC messages are RF-superimposed over the blue 12-volt auxiliary power supply between the tractor and trailer. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: C
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