A Golf Ball (M = 0

A golf ball (m = 0.05 kg) and a cannonball (M = 100 kg) collide head-on.Before the collision,the two balls had equal speeds of 30 m/s and opposite directions.After the collision,the speed of the golf ball is approximately

A) 0 m/s.
B) 15 m/s.
C) 30 m/s.
D) 60 m/s.
E) 90 m/s.