Earth's Interior Is Layered Because

Multiple Choice

Earth's interior is layered because

A) centrifugal force separated out the materials based on weight as the Earth solidified.
B) materials became sorted based on density as the Earth solidified.
C) materials became sorted based on electromagnetic fields as the Earth solidified.
D) the planet was formed due to successive bombardments of cosmic debris.
E) successive subduction events at convergent plate boundaries forcing earthen materials downward.