Jerome Pitches a Baseball of Mass 0

Jerome pitches a baseball of mass 0.15 kg. The ball arrives at home plate with a speed of 40 m/s and is batted straight back to Jerome with a return speed of 60 m/s. What is the magnitude of change in the ball's momentum?

A) 4.0 kg
M/s
B) 8.0 kg
M/s
C) 15 kg
M/s
D) 20 kg
M/s