Final answer:
Ancient Greek communities were called city-states, or 'polis' in Greek, and had their own independent governmental systems, including forms like democracy in Athens where all male citizens could participate. Option C is correct.
Step-by-step explanation:
Ancient Greek communities were known as city-states, or polis in Greek. These were individual communities that were politically independent and had their own systems of government which could range from democracies to oligarchies. Athens, for example, was known for developing a form of direct democracy where all male citizens could participate in decision-making.
The agora was a central spot in these city-states, functioning as both a marketplace and a public square where citizens gathered to discuss matters of the polis. Over time, various forms of government were experienced within these city-states, and they frequently engaged in conflicts with each other despite sharing a common language, religion, and culture.