The Utility of Stratigraphy for Dating Purposes Is Based on the Fact

The utility of stratigraphy for dating purposes is based on the fact that

A) soil strata are uncluttered by bones, stones, and artifacts.
B) once in the soil, there are very few things that can damage or disturb bones.
C) all environmental forces leave behind the same kind of soil deposit.
D) the depth and order of undisturbed soil strata reflect the age of their deposition.
E) higher strata are usually older than lower strata in undisturbed soil.