Answer: B. There were multiple city-states with diverse forms of government and culture.
Explanation: Looking at the question, it's pretty obvious if you know even a little Greek history that the answer can't be C or D. There was never a unified Greek empire. Then all you really have to do is choose between A and B. The answer here is B. To break it down, think about Sparta and Athens, for example. Athens was known for democracy and the idea that all its citizens should have a voice in governing. Sparta was completely different, known for its culture valuing athleticism and militarism. Using this as an example, the answer should be B.