If your accelerator becomes faulty, what is the first step you should take?

Answer: A — Shift to neutral

If your accelerator becomes faulty while driving, the first step you should take is to shift to neutral. Shifting to neutral will disengage the engine from the wheels, allowing you to coast to a stop safely. This action can help prevent further acceleration and give you more control over the vehicle. Turning on fog lights (option B), pressing the brakes firmly (option C), and honking the horn (option D) would not directly address the issue of a faulty accelerator. These actions are not the appropriate first steps to take in this situation.