While Developing Within Its Egg, a Bird Is Exposed to Androgens

Multiple Choice

While developing within its egg, a bird is exposed to androgens deposited into the yolk by its mother while the egg formed in her ovaries. First-laid eggs have the lowest androgen levels, with levels increasing with each egg laid; thus, first-laid eggs can be used in experimental manipulations. When black-headed gulls (Larus ridibundus) from an experimental group (birds hatched from first-laid eggs injected with androgens and sesame oil) were compared with those from a control group (those hatched from first-laid eggs injected only with sesame oil) , the experimental birds exhibited

A) delayed hatching.
B) depressed rates of begging for food.
C) suppressed growth.
D) suppressed immune function.