Which of the following observations would be adequately explained by Newtons third law?
A. When turning a corner, a passenger in a car is pushed against the door. B. A skater stands on a frictionless pond, tosses her bag in one direction and she accelerates in the opposite direction. C. The normal force on an object is always equal to the force of gravity acting on the same object. D. The friction of a surface causes a sliding object to come to rest. E. When firing a rifle, the force of the rifle on the bullet, is greater than the force of the bullet back on the rifle.