How does Newton's third law explain how a rocket is launched upward? A. The force of Earth's gravity balances with the force of the rocket engines. B. The mass of the rocket determines how much force is needed to move it into orbit. C. The rocket will remain motionless on the launchpad until an unbalanced force is applied. D. The force it exerts on its exhaust gases is equal to the force the exhaust gases exert on the rocket.