Which statement describes the yuan dynasty of china under kublai khan?
a. economic and cultural exchange with europe increased.
b. long-distance trade on the silk road declined.
c. peasant farmers and laborers gained greater prestige.
d. religious restrictions tightened, and persecution increased.

Kublai Khan, the grandson of the infamous Genghis Khan was actually a very strong leader. He practiced religious tolerance, so Option D) is removed.
He was also the first non-native emperor to conquer China, and he freed up the Silk road for his empire. Therefore, the answer is A) During his reign, trade and social reformation with the West (Europe) increased.