Question

In order to increase momentum we must increase either the object's

Answer 1

C because in order to make something go faster you need to increase it's velocity

Answer 2

The answer is C: mass or velocity. The equation for momentum is as such:
Momentum = Mass * velocity (mass in motion). The equation indicates that if mass or velocity increase, the momentum will also increase, since both mass and velocity are directly proportional to momentum. Hope this helps!