Answer:
Might be B
take that with a grain of salt though
Explanation:
About 470,693 square miles (1.22 million km²)
Answer:
Muslim merchants migrated east to the land of Tang, Changan and other Chinese cities, Some merchants returned to their lands but others remained in those lands with the Tang emperor's permission and also allowed them to marry Chinese women. In Islam, Muslim children were also Muslims and the religion in the East rose.