D. They were harvested in record numbers by humans
E. They increased pressure on sea urchin populations.
2. According to the pas s age, it is likely that during the m id-1700s, s ea urchin populations near the Bering and Copper is lands
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
答案:AB
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