Which of these survive Earths crust?

A. Inner layer consiting of two parts
B. Middle layer, density increases with depth
C. Top portion called asthenosphre, thickest layer
D. Thinnest under the oceans and thickest under continent's
I picked C but had thoughts about D ....

2 answers

Describes* earth crust
From Wikipedia:

"The continental crust is thicker, and the oceanic crust is thinner. "