What Does the Fact That Earth's Interior Is Sorted into Layers

Multiple Choice

What does the fact that Earth's interior is sorted into layers indicate?

A) The process of formation from a nebula (by the slamming together of material and planetesimals that stuck together on impact) produces nice,neat layers.
B) Earth was once in a molten state,during which materials became sorted based on density.
C) The rotation of the early Earth acted like a centrifuge which separated materials based on weight.
D) Nothing can be inferred about such a perplexing level of organization.