GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - HQKSCG9WP74JMXV5J

According to the passage, it is likely that during the mid-1700s, sea urchin populations near the Bering and Copper islands A. were diminished by sea cow predation B. experienced substantial increases C. migrated to waters with more plentiful food supplies D. were reduced by the pressures of hunting E. appeared to be malnourished