1. Which statement about China and trade does this passage
(A) Trade between Europe and Cathay was greatly enhanced by the
security established by the Mongol Empire.
(B) Merchants rarely traveled between Tana and Sara because the road
was more dangerous than the route between Tana and Cathay.
(C) Cambalec was an important trading hub, but it was not a large city.
(D) The author felt the risks of trade with China outweighed the rewards.
