GRE Reading Comprehension: PPO-GRE阅读PPO - 6G9BA982KLV39AXQR

The passage suggests that which of the following is true of fluctuations in snowshoe hare populations? A. Changes in hare population levels are not highly correlated with changes in predator population levels. B. Hare populations in one region are unlikely to peak at the same time that populations in nearby regions are at the lowest point of the cycle. C. The regularity of hare population fluctuations is greater in regions where populations peak every eight years than in regions where they peak every eleven years. D. In areas where hare population cycles are greater than eleven years, predator mobility is unusually high. E. Fluctuations in hare populations vary greatly from region to region, depending on available winter food supply.