What is geothermal energy? what is the source of heat contained in geothermal energy?

Option (c). The ball experiences the greater momentum change.

Explanation:

Suppose the initial momentum of the putty and the ball is .

Since the final velocity of the putty is zero, it final momentum must be zero, too. So its momentum was reduced in .

In the case of the ball, we have that its final speed is the same, but its final velocity has opposite direction. As the velocity and the momentum are vectors, the direction is relevant. Taking this into account, the final momentum of the ball is . So, its momentum was reduced in .

This leads us to the conclussion that the rubber ball experiences a greater momentum change than the lump of putty. This is the option (c).