A ball of mass `m` falls vertically to the ground from a height `h_1` and rebound to a height `h_2`. The change in momentum of the ball on striking the ground is.
A. `mg(h_(1)-h_(2))`
B. `m(sqrt(2gh_(1))+sqrt(2gh_(2)))`
C. `msqrt(2g(h_(1)+h_(2)))`
D. `msqrt(2)(h_(1)+h_(2))`