GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - IEYA4C_YBA5O2057J

It can be inferred from the passage that the decline of abalones in the waters east of Cape Hangklip was probably due in part to A. an increase in the area's population of rock lobsters B. illegal harvesting of adult abalones in the area C. a change in the feeding behavior of sea urchins