Which of the following provides the best explanation as to why convection currents in the mantle cause tectonic plate movement?

A.
Warm, more dense molten material rises while cool, less dense material sinks creating convection currents which cause the tectonic plates to move.

B.
Cool, less dense molten material rises while warm, more dense material sinks creating convection currents which cause the tectonic plates to move.

C.
Cool, more dense molten material rises while warm, less dense material sinks creating convection currents which cause the tectonic plates to move.

D.
Warm, less dense molten material rises while cool, more dense material sinks creating convection currents which cause the tectonic plates to move.