When approaching a railroad crossing with a malfunctioning signal, what should you do?

Answer: C — Stop and wait for further instructions

Approaching a railroad crossing with a malfunctioning signal can be dangerous. Option A is incorrect because trains can be unpredictable and may be approaching. Option B is incorrect because it is illegal and puts you and others in danger. Option D is incorrect because driving faster is never a safe solution to any problem. It is important to follow option C and stop at the crossing, staying alert for further instructions or signs of potential danger.