Answer: A
Explanation: invention of movable type
The correct Answer is A Hope this helps :)
I'd say its A, because after wars things start to decline.
I hope this is right and helped you out.
Answer:
The provisions of the Missouri Compromise forbidding slavery in the former Louisiana Territory north of the parallel 36°30′ north were effectively repealed by Stephen A. Douglas's Kansas–Nebraska Act of 1854.