How does this photograph illustrate Newton's third law of motion? A) The greater the swimmer's acceleration, the more force applied and the lower his mass. B) The more force the swimmer applies back on the wall, the faster his movement forward in the water. C) In order for the swimmer to move forward in the water there must be an unbalanced force acting on the him. D) The force acting forward is greater than the force acting in the opposite direction: the swimmer accelerates.