With an increase in the development of paper, we see
A. a decrease in knowledge, and increase in written
communication
B. an increase in knowledge as well as written books
C. a lot more trade starting to take place

B. An increase in knowledge as well as written books

Explanation:

You see an increase in knowledge and written books because as time goes on more books can be written and as more and more are written more people can read them and learn from them. People can also write their own books about something they know, which would spread their knowledge to others that read and add to the amount of written books.

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