A ball with a mass of 0.15 kg has a velocity of 5 m/s. It strikes a wall perpendicularly and bounces off straight back with a velocity of 3 m/s. The ball underwent a change in momentum equal to 
选项为:A:0.30 kg·m/s  B:1.20 kg·m/s  C:0.15 kg·m/s  D:5 kg·m/s  请回答其中一个选项.