How did Tang and Song dynasties unify China?

Both Song and Tang dynasties both benefit China in different ways. Printing, gunpowder, and a mechanical clock are all political, economic, and cultural achievements. The tang dynasty made the economy and government grow. Also, Conquered and created tributary states.

Explanation:

the main inference that can be drawn from jean jacques rousseau's book the social contract is: a. people can enjoy civil and physical freedom, even if it sometimes harms society.

hope this

i think it would be a