The driver of an automobile traveling at 80 km/hr locks his brakes and skids to a stop in order to avoid hitting a deer in the road. If the driver had been traveling at 40 km/hr, how much faster would he have stopped?

A. 4 times the distance
B. 2 times the distance
C. 1/2 the distance
D. 1/4 the distance
E. Not enough information to tell