Question

By what decade were books readily available to the public across the United States and Europe? A. 1690 B. 1750 C. 1860 D. 1820

Answer 1

Answer: 1820

Explanation:

I believe the answer is the 1820, as the introduction of steam powered printing presses and steam powered paper mills significantly lowered the cost of books to decrease and significantly increased their circulation/availability.

hope this  helps

-lvr