The Fact That Earth's Interior Is Differentiated Suggests That

The fact that Earth's interior is differentiated suggests that

A) it formed first from denser material and then afterward accreted lighter material.
B) it has both a liquid and solid core.
C) it was entirely liquid at some point in the past.
D) only the crust is solid; the rest of Earth's interior is liquid.
E) it formed first from lighter material and then afterward accreted heavier material.