None of these answers are entirely correct but A is the closest to being an effect of the end of the 30 Years War.
The Pan Germanism movement that developed in the 19th Century as a result of the Peace of Westphalia and the development of the notion of sovereign-states led to the creation of a unified Germany.
Answer:
The correct answer to this is actually D. I did my research and "The rise of the absolute monarchs take place in France. And they are the ones who ended the thirty years war.