Which is the best example of Newton's Second Law of Motion?
A student has on roller skates and he decides to push against the railing. He immediately begins to roll backwards.

A small, lightweight ball and a large, heavy ball are dropped off of a roof. They both strike the ground at the same time.

A baseball player hits a baseball that is pitched to him. The ball immediately soars back in the direction of the pitcher.

You are riding in a car that makes a quick right turn. You immediately slide across the back seat.