The correct response that demonstrates Newton's third law of motion is:
If two bumper cars collide with a certain force, then they will move away from each other in opposite directions with the same force.
Newton's third law states that for every action, there is an equal and opposite reaction. When one bumper car exerts a force on another during a collision, the second car exerts an equal force back on the first car. Therefore, both cars will move away from each other after the collision, obeying the equal and opposite reaction principle.