Compared to the Middle Paleolithic, Upper Paleolithic People Used Lithic

Compared to the Middle Paleolithic, Upper Paleolithic people used lithic raw materials that:

A) were available only within their own region, as opposed to the distant sources used by Middle Paleolithic people
B) were available often at a great distance from their home territories, implying broader trading networks in the Upper Paleolithic
C) were located at higher elevations, showing an expansion of human adaptation to locations above the tree line in many regions
D) Upper Paleolithic people did not use lithic raw materials to any great extent