Which would be needed to make a ball at the base of a ramp move up the ramp?

A. Inertia
B. Force
C. Gravity

I already canceled out gravity but im not sure about A and B..

report!

explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it