Why were tang and song cities considered “cultural centers of an international age? ”

During the rule of the Tang and Song dynasties, China was a wealthy, prosperous, and advanced country. The trade has been well developed between the East and the West, so there was constant contact between the different civilizations. The cities of China during these two dynasties were considered as cultural centers of an international age, and rightly so. Apart from being very well connected, these cities very beautiful, enormous, very well organized, economically and politically powerful, technologically and culturally advanced, all of which was making them superior in comparison to the other cities, as well as being an example of how a city should be and develop.

i think it would be c.

hope i'm correct

explanation:

detente translated to english means politics