Plate Tectonic Theory Is Based on

Plate tectonic theory is based on

A) a thermal convection model in which cool material in the earth's mantle rises and spreads laterally beneath the crustal plates.
B) the idea that the earth's crust is fragmented into rigid crusts that are sinking slowly beneath crustal plates.
C) the idea that coacervate formation causes continents to drift apart slowly on their crustal plates.
D) observations that the sea floor is slowly spreading away from oceanic ridges due to thermal convection in the mantle.
E) all of these.