B. It brought the discovery of the Chinese papermaking process.
Explanation:
With the spread of trade, Islamic countries could get more familiar with the outside world and other nations, influence them, and in turn be influenced by them. The Chinese had one of the biggest influences on them with their invention of paper and writing on it. Now, Islamic religious laws could be written down and paper and spread throughout countries to educate people on their religion.
I don't see how checks or medicine would influence religion, and arabesques already existed in the Islamic world.
