GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 774AYX7GX27XCSE7J

The passage suggests which of the following about the reservoirs at Tikal? A. They may have been designed by people from northern Yucatan. B. They may have hastened the Classic Maya collapse. C. They were insufficient to protect the Maya against some lingering droughts. D. They were more effective than the cenotes found in northern Yucatan. E. They formed a basis for certain Mayan cultural traditions.