Which of the following best describes china's interactions with other east asian countries during tang dynasty?

a. tang leaders blended together ideas from many of it's neighbors to create a new culture.

b. tang emperors conquered china's neighbors, but allowed them to maintain their own cultures

c. china's east asian neighbors refused to trade with the tang, even though it harmed their economies.

d. many east asian societies intentionally copied the tang's culture and confucian government.