19. You are practicing tennis alone by hitting a tennis ball forward toward a cement wall. Each time the ball hits the wall, it bounces backward at high speed so that you can hit it again. During its bounce, the ball

• retains approximately all of its momentum but transfers most of its energy to the wall.
• retains approximately all of its energy and momentum.
• retains approximately all of its energy but transfers most of its momentum to the wall.
• retains approximately all of its energy but transfers more forward momentum than it had to the wall.