A 50 Kg Ball Is Traveling at 4

A 5.0 kg ball is traveling at 4.0 m/s and strikes a wall. The ball bounces off the wall with a velocity of 4.0 m/s in the opposite direction. If the ball is in contact with the wall for 0.10 seconds, then the magnitude of the impulse on the ball is

A) 24 kg m/s.
B) 30 kg m/s.
C) 36 kg m/s.
D) 40 kg m/s.
E) 50 kg m/s.