After Reading the Paragraph Below, Answer the Questions That Follow

After reading the paragraph below, answer the questions that follow.
California condors, large, predatory birds that were previously on the edge of extinction, have benefited from a program that raises birds in captivity and then releases them into the wild. The reintroduction program, however, is having variable success.
-If it were determined that condor reproduction along the coast is being harmed by DDT in the condors' foods, which of the following actions would be most useful to improve the situation?

A) Provide carcasses of animals without DDT that the condors can eat.
B) Move all condors away from the area where DDT exists.
C) Monitor DDT use in the area where reproduction is failing.
D) Remove all eggs from condor nests in the coastal population so that there will be no hatchlings with DDT.