Geologists conclude that the clasts in Layer A are older than the layer itself. Which geologic principle do the geologists use to draw this conclusion? A. Principle of inclusion B. Principle of faunal succession C. Principle of original horizontality D. Principle of superposition

A. Principle of inclusion.

Explanation:

The principle of inclusion in geology is a principle that involves the relative ages of rocks, like the igneous intrusions that cut across the formation of sedimentary rocks and the principle states that of the intrusion or the casts are made in sedimentary rocks they must be older than the formations that contained them.