The correct answer is 1. The Greek alphabet was used in all the Greek city-states.
The Greek city-states used this common alphabet, derived from the Phoenician alphabet, as a point of cultural and linguistic connection between all of them.
The other aspects were not common among all of them. For example, Sparta had a military training and culture totally different from that of Athens. Each city had its own philosophers, who developed very different thoughts. And music, like all cultural expressions, was typical of each region.
