Answer:
C.oversaw a prosperous golden age for China
Step-by-step explanation:
The Tang dinasty, was a dinasty of the Chinese empire that oversaw a great golden age for the empire, from the 7th century to the 10th century, historians qualify it as a high point in China´s history,the first half of the reign was a time of prosperity and peace, untill the rebellion came in mid 700´s and started a time of war and lead to the eventual fall of the Tang dinasty.