Earth Has an Average Density of 5500 Kg/m³,whereas the Density

Multiple Choice

Earth has an average density of 5500 kg/m³,whereas the density of rock on its surface is about 3000 kg/m³.What conclusion can be reached about Earth's core from this observation?

A) The core is composed of material with density about twice that of the surface material.
B) The core consists of lower density material than surface rock.
C) The core is very hot.
D) The core is made of material far denser than surface rock.