You are using Cruise Control and following another car. What should you do if the car in front of you is driving too slow?

Answer: D — Turn off your Cruise Control

If you were to increase your speed to pass the car in front of you, this would defeat the purpose of using Cruise Control, which is to maintain a consistent speed. Tapping your brakes may startle the driver and potentially cause an accident. Flashing your headlights is also not a recommended solution as it can be seen as aggressive and may also startle the driver. The best course of action is to turn off your Cruise Control and adjust your speed manually to maintain a safe distance behind the other car.