GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 57KHAO7DF5R4DBG9J

According to the passage, since the early 1900s, sea urchins in the waters east of Cape Hangklip have A. significantly changed their feeding habits B. suffered increased predation from a certain species C. experienced increased competition for kelp, their main source of nourishment D. seen a sharp decline in the availability of kelp, due to environmental changes E. rebounded as commercial fishing in the region has declined