Question: The motion of a car accelerating in a straight line differs from the motion of a car moving in a straight line at a constant speed. Which change best describes acceleration of a car?

  Options: 
 A. a change in the direction of the car
 B. a change in the distance the car travels
 C. the change in velocity divided by the time for that change
 D. the change in the time for the car to travel a distance
Answer: C