A fleet of fishing boats catches fish in one area over the continental shelf for many years. Eventually, there are few fish left. Conservation measures might include, which will . Select the correct answer.

A.
collecting minerals from the ocean floor; remove toxic substances from the water
B.
removing more resources; allow the fish to find to safer areas to live
C.
preventing the water cycle; keep pollution from moving into the fish’s environment
D.
limiting the number of fish the boats can catch; give the fish a chance to reproduce