Which of the following statements is NOT supported...

Câu hỏi: Which of the following statements is NOT supported in the passage?

A. Many pollutants deposited in the oceans finally become part of the global food chain.

B. It is apparent that the oceans have been polluted for a long time.

C. Industrial wastes and agricultural run-off are blamed for the degradation of the oceans.

D. The oceans in the past were more contaminated than they are now.