Which statement best compares Earth’s crust to its mantle?
A.
The crust only contains nonmetals, and the mantle contains metals.
B.
The mantle is the thinnest layer, and the crust is the thickest.
C.
The mantle only contains nonmetals, and the crust contains metals.
D.
The crust is the thinnest layer, and the mantle is the thickest.