Which of the following is an example of Newton's Third Law of Motion?
A. A swimmer pushes water back with her arms, but her body moves forward.
B. When a car slams on their brakes and papers on the passenger seat fall to the floor of the car.
C. A pitched softball goes faster than one that is gently thrown.
D. As an ice skater pushes harder with his leg muscles, he begins to accelerate.
E. None of these are an example of Newton's Third Law of Motion.