A driver is traveling on a very wet road; if to brake he needs to press the brake pedal all the way down, what may this be mainly due to?

A)The ABS system needs a check.
B)Excessive cooling of the brake discs.
C)A failure of the brake system.Correct
# Explanation
When on a wet road it is necessary to press the brake pedal all the way down to achieve effective braking, it mainly indicates a **failure in the brake system**. This malfunction reduces the vehicle's braking capacity, forcing the driver to apply greater pressure on the pedal. In wet conditions, a defective brake system becomes especially dangerous, compromising road safety.