Scientists have tried raising endangered whooping cranes in captivity by using sandhill cranes as foster parents. Which fact prompted this strategy to be abandoned?
A) the fostered whooping cranes' critical period was variable such that different chicks imprinted on different "mothers"
B) sandhill crane parents rejected their fostered whooping crane chicks soon after incubation
C) none of the fostered whooping cranes formed a pair-bond with a whooping crane mate
D) sandhill crane parents did not properly incubate whooping crane eggs

Question

Quizplus · Accepted Answer

The strategy was abandoned because the fostered whooping cranes did not form pair-bonds with their own species, which is crucial for the survival and reproduction of the species in the wild.

Scientists Have Tried Raising Endangered Whooping Cranes in Captivity by Using