Question: A bicycle is traveling at 3 meters per second (m/s). The rider applies the brakes and stops the bicycle in 3 seconds. What is the average rate of acceleration of the bicycle during this time?

  Options: 
 A. -1 m/s^2
 B. -6 m/s^2
 C. 3 m/s^2
 D. 9 m/s^2 
Answer: A