GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - Y2B474_7B5FQE7U4J

From the passage it can be inferred that Omagua depended on A. overland transport to communicate between villages B. foraging inland to obtain foodstuffs not available locally C. some form of fertilization to boost agricultural production D. fish and turtles for at least part of their diet E. trade with other peoples for some raw materials