Which statement best describes Earth’s outer layer underneath the surface in the image?

A) Underneath the soil, Earth's outer layer is made of water.
B) Underneath both the soil and the ocean, Earth's outer layer is made of sand and water.
C) Underneath the soil, Earth's outer layer is made of hard, solid rock. Underneath the ocean, Earth's outer layer is made of sand.
D) Underneath both the soil and the ocean, Earth's outer layer is made of hard rock, solid rock.