After 451 BC, to be a citizen of the Athenian democracy required specifically:a. being born in the polis of Athens b. membership in the Delian League c. membership in the Pentecontaetia d. Both parents being Athenian worship of Athena

the answer is D, because when you were born back then the way it worked was when you were born into something, that was what you had to live by no matter what, so when you are born of two parents who were part of the Athenian worship of Athena, you are part of that blood line and it cannot be messed up otherwise shame was brought to your family.