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Which of the following statements is supported by the discussion of fish catches in paragraph 6? A. Global overfishing has been difficult to recognize because there are so many different species of predatory fish in different areas around the world. B. Closer inspection of the global fishing industry was undertaken recently because we have not been able to harvest enough fish. C. Reduced numbers of predatory fish that used to be caught most often are evidence that humans have overexploited these fish. D. Fish species further down the food chain now prey on species that used to be harvested.