For Which One of the Following Situations Will the Path

Multiple Choice

For which one of the following situations will the path length equal the magnitude of the displacement?

A) A toy train is traveling around a circular track.
B) A ball is rolling down an inclined plane.
C) A train travels 5 miles east before it stops. It then travels 2 miles west.
D) A ball rises and falls after being thrown straight up from the earth's surface.
E) A ball on the end of a string is moving in a vertical circle.