A. I could never figure out why this "chicken or the egg" question was even a tough one. Think about it: lizards, fish, amphibians ... there were, like, a zillion species on Earth that laid eggs long before chickens appeared on the evolutionary stage.
Bonus A. The chicken came first, 'cause eggs don't have sex (really weird internet sites notwithstanding -- and even then I bet the egg never gets to finish).
Q. Shouldn't the rule "your job is to take care of everyone smaller than yourself" apply to human beings?