What is the definition of hydroplaning?

Answer: C — When there is a thin layer of oil, dirt, or water between the car and causing you to temporarily lose control of the vehicle

Hydroplaning occurs when there is a thin layer of oil, dirt, or water between the tires of the vehicle and the road surface. This causes a loss of traction which can result in the driver temporarily losing control of the vehicle. This is why option C is the correct definition of hydroplaning. Options A, B, and D are incorrect definitions. Option A refers to the engine overheating, option B relates to brake failure, and option D mentions the steering wheel locking, which are all unrelated to hydroplaning.