I believe the answer would be A
If the question is true or false, the answer is true.
it depends do you want to focus on military aspects for greek life or the arts and democracy personally i would go with Sparta as you can find a lot more information on greek battle doctrines than say the Athenian battles other than Artemesium strait or the battle of marathon
Answer: Heliocentrism (the sun is the center of the solar system)
The prior belief was that the earth was the center of the solar system (geocentrism)