Early humans used ______ to make crude implements and weapons.
Early humans made a relatively wide variety of stones tools that were used for processing several of stone tools that were used for processing various plant and animals materials. Their tool kits included chopper, cleavers and hammers as well as flakes used as knives and scrapers. Stones have been used to make a wide variety of different tools throughout history, including arrowheads, spears points and querns. Stone tools may be made of either ground stone and a person who creates tools out of the latter is known as a flintknapper.
Thus, the correct option is B.