The following image is a prediction of how an earthquake would spread from the epicenter (marked by a star). Red indicates the worst areas, and green indicates the places where there is the least shaking. Water is colored blue. Consider a seismic wave—an earthquake—that starts in the middle of the red area and travels outward along the surface of the earth. Point A is the same distance from the epicenter as point B. Using what you know about the movement of waves, how would you expect the seismic waves to be different at point A and point B?

A.
The ground would shake up and down at point A but back and forth at point B.

B.
The waves would be larger at point A than at point B.

C.
The waves would be exactly the same at points A and B.

D.
The waves would arrive at point B before they arrived at point A.