What Type of Stresses Broke Earth's Lithosphere into Plates

What type of stresses broke Earth's lithosphere into plates?

A) impacts of asteroids and planetesimals
B) internal temperature changes that caused the crust to expand and stretch
C) the circulation of convection cells in the mantle,which dragged against the lithosphere
D) cooling and contracting of the planet's interior,which caused the mantle and lithosphere to be compressed
E) volcanism,which produced heavy volcanoes that bent and cracked the lithosphere