What force causes you to move upward when you jump into the air?
a. You push down on Earth with a force greater than your weight, so Earth pushes back on you with a force that is equal in magnitude but opposite in direction

b. You push down on Earth, and because Earth is so large, it pushes back on you with a force that is greater than the downward force you exerted on it

c.You push down on Earth, but because Earth is stationary, Earth cannot exert an upward force on you so internal forces from your muscles act on your body itself.

d.You push down on Earth, which causes it to move slightly down under your feet and give you the sensation that you have risen.​