Because of sport hunting and the draining of marshlands, the size of the whooping crane population reached a low of 16 individuals in 1940. Since then, conservation efforts have been put in place to increase the whooping crane population size. Which of the following actions would most likely increase the size of the whooping crane population with the
least impact on the ecosystem?
O A. Introducing new insect species for whooping cranes to eat
B. Eliminating all wild predators in the whooping crane's habitat
C. Establishing protected areas for whooping crane breeding and migration
D. Counting whooping crane opulations by tagging and releasing individual birds