The picture shows a diagram of Earth's layers.

What kind of activity is most likely at point X?
A.

massive storms, as the weak crust allows heat to spread from the mantle to the atmosphere and increase ocean temperatures
B.

strong drought, as the movement of material under the crust heats the waterways on the surface, causing them to evaporate
C.

earthquakes and volcanoes, as convection in the magma beneath the crust pulls the plates against each other
D.

the formation of large valleys, as the rotation of Earth about its axis causes a downward pull on the plates

C. earthquakes and volcanoes, as convection in the magma beneath the crust pulls the plates against each other