Which of these statements about brakes are true?

Answer: A — The heavier a vehicle or faster it is moving the more heat the brakes have to absorb to stop.

Brakes are a crucial component of a vehicle's safety system. Option B is incorrect because wet brakes can cause a loss of friction, making them less effective. Option C is also incorrect because heat actually helps to increase the friction between the brake pads and rotors, making hot brakes more effective than cool brakes. Option D is not a true statement as brakes do require regular maintenance to ensure they are working properly and to prevent potential safety hazards. Option A is the only correct statement as the weight and speed of a vehicle determine how much heat the brakes need to absorb to stop the vehicle. This is why heavier vehicles or faster moving vehicles require stronger brakes to be safe.