One of the consequences of speed is that as it increases...

A)reaction time is reduced.
B)the greater the severity of injuries in an accident.Correct
C)coordination of movements is lost.
Speed is one of the most important risk factors in driving. As an example: having an accident at 50 km/h, the impact is equivalent to falling from a third floor. At 80 km/h similar to a fall from seven floors and at 120 km/h similar to falling from 16 floors. The higher the speed at which one is travelling, the greater the severity of traffic accidents.
Reaction time is the time that elapses from the moment the driver sees an obstacle until he reacts. This time varies depending on the psychophysical state of the driver, never on speed or on the state of the road. Although it may seem that the reaction to an obstacle or unforeseen situation should be instantaneous, the average reaction time of a driver is approximately 0.75 seconds.