G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle's auxiliary power socket?

1. AThe socket is not wired with an RF-shielded power cable
2. BThe socket's wiring may be inadequate for the current drawn by the transceiver
3. CThe DC polarity of the socket is reversed from the polarity of modern HF transceivers
4. DDrawing more than 50 watts from this socket could cause the engine to overheat

Pick an answer to check it.