A 1200 Kg Car Is Traveling at 3

A 1200 kg car is traveling at 3.00 m/s and strikes a wall.The 1200 kg car bounces off the wall with a velocity of 4.00 m/s.If the contact with the wall by the car lasts for 0.10 seconds,then the average force on the car is

A) 46,000 N.
B) 55,000 N.
C) 63,000 N.
D) 75,000 N.
E) 84,000 N.