Dr. Mendoza and his team are studying two plates that are far apart from each other. However, these two plates used to be next to each other. Which diagram shows what happened between these plates?

A) Diagram A: Sand and dirt filled in the gap that was created by the plates moving apart.

B) Diagram B: Soft, solid rock from underneath the plates rose and hardened, adding solid rock to the edges of both plates.

C) Diagram C: A new plate from underneath filled in the gap that was created by the plates moving apart.

D) Diagram D: Ocean water filled in the gap that was created by the plates moving apart.