Why are each of the five C's especially plentiful (found in large amounts) in Arizona?

During the paleolithic, hominins grouped together in small societies such as bands, and subsisted by gathering  plants  and fishing, hunting or scavenging wild  animals. the paleolithic is characterized by the use of knapped stone tools, although at the time humans also used  wood  and bone tools.

The answer for this question is c

Who it was like back then