California Condors, Large, Predatory Birds That Were Previously on the Edge

Multiple Choice

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 action would be most useful to improve the situation?

A) providing carcasses of animals without DDT for the condors to eat
B) moving all condors away from the area where DDT exists
C) monitoring DDT use in the area where reproduction is failing
D) removing all eggs from condor nests in the coastal population so that there will be no hatchlings with DDT