During a family trip to Laura's grandmother's house, the family cast traveled a distance of of 8 miles in 24 minutes. During the trip they stopped for two red lights. Which statement correctly describes the motion of the car? And why?
A) The Car Traveled at an acceleration of 0.83 mi/h
B) The Car Traveled at a constant acceleration of 0.83 mi/h
C) The Car Traveled at an average speed of 20 mi/h
D) The Car Traveled at an constant speed of 20 mi/h