B. There's even a show about it on Netflix.
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.
B. Byzantine culture; and
D. Orthodox Christianity
In the Middle Ages, the Kingdom of Serbia was an independent kingdom under the <span>Vlastimirović dynasty. But after that dynasty faded in the 10th century, Serbian territory fell under Bulgarian or Hungarian or Byzantine control. The Byzantine influence was long-lasting. So also was the influence of Orthodox Christianity, which had been adopted as the state religion of Serbia in the 9th century. By the 13th century, the Serbian Orthodox Church was recognized as an independent partner church within the Eastern Orthodox communion.</span>