The final sentence of the passage primarily serves to do which of following? A. cite a particular factor that may have influence the decision to settle the West Branch site B. identify a possible reason why the inhabitants of the West Branch site may have specialized in the manufacture of ceramics C. suggest that inhabitants of the West Branch site may have had agricultural surpluses to use for trade with other settlements in the region D. present evidence to support a claim that the West Branch site was not a pottery consuming settlement E. cite one reason to doubt that the ceramic specialization at the West Branch site served to offset subsistence shortfalls