问题详情

What is the main idea of the passage？

A．U. S. fishing policy is questioned by interest groups.

B．U.S. tightens national and local fishing policy.

C．U. S. fishery managers are forced to impose fishing limits.

D．U. S. is seeking ways to end overfishing.

请帮忙给出正确答案和分析，谢谢！