You are driving your car in good weather and road conditions. The proper way to ensure that you are following far enough behind other cars is to
A: Look at the other cars around you, and use the same following distance they are using.
B: Try to estimate how many car-lengths you are behind the vehicle ahead of you. You should
always be at least three car lengths behind them.
C: Watch as the vehicle ahead of you goes past a road sign or fence post. It should take at least
three seconds for you to reach the same spot on the road.