TOEFL Listening: TPO-TOEFL阅读TPO - K05UWZ2599PGSU55N$

What can be inferred from the fact that the Maya lived in a "relatively uniform environment"? A. The communities could not obtain resources they lacked by trading with each other. B. The communities' ceremonial centers were all organized in much the same way. C. Increased competition between the communities to export their local commodities expanded commercial networks beyond the nearby highlands. D. Different communities tended to specialize in the production of different commodities.