Based on the diagram, which of the following best describes how the plates are moving?
A. The plates are being pushed toward each other by the cycling of materials in the core.
B. The plates are being pushed toward each other by the waves of heat traveling through the mantle.
C. The plates are being pushed away from each other by convection currents in the mantle.
D. The plates are being pushed away from each other by the eruption of hot magma from the core