The time from when you see a hazard until you act, what is it called?

The time from when you see a hazard until you act, what is it called?
A)Braking time.
B)Stopping time.
C)Reaction time.Correct
Reaction time is the time that elapses from when the driver perceives a hazard until they respond, for example, by pressing the brake. This time depends on factors such as tiredness, alcohol or distractions. It should not be confused with braking time, which is the time that passes from when the brake is pressed until the vehicle comes to a complete stop.