单选题 . ①Data of modern and historic peasant communities suggest that individuals and communities specialize in ceramic production for trade primarily to offset subsistence shortfalls arising from inadequate or insufficient agricultural land. ②Harry investigated whether this correlation of ceramic specialization with agricultural marginality occurred among prehistoric inhabitants of the American Southwest. ③At Arizona's West Branch site, occupied A. D. 900-1100, abundant pottery manufacturing materials suggest village-wide ceramic production in excess of that needed for household purposes.

3. The final sentence of the passage primarily serves to do which of following? ______

A、 cite a particular factor that may have influenced 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

【正确答案】 B

【答案解析】 B：a possible reason指的是为了弥补食物短缺而生产陶器。
A：文中未提及。
C：文中未提及。
D：文中未提及。
E：doubt不对，因为最后一句是支持第一句观点的