The Internal Structure of Earth Is a

Multiple Choice

The internal structure of Earth is a

A) core of solid rock extensively enriched in iron,surrounded by a solid mantle of pure rock.
B) large core of iron,partly solid and partly molten,surrounded by a thick,flexible mantle of rock.
C) large,solid iron core surrounded by a thick,flexible mantle of rock.
D) core of rock and iron,surrounded by a mantle of liquid hydrogen.