What caused the formation of European nation-states in the late medieval
period?

The Thirty Years' War, fought throughout central Europe from 1618–1648 between Protestants and Catholics, laid the legal foundation for the nation-state. The war involved many nations of Europe, including many small German states, the Austrian Empire, Sweden, France, and Spain.

Explanation:

b.   jim crow laws were enacted in northern states.

the correct answer is “opportunity cost”. opportunity cost is what a company misses out because it decided in one option over another one. in this case, the company decided to invest in building a factory so it gave up another possible benefit or profit in order to achieve success with the factory.  

trade-off is not the correct answer since it is a situation in which you accept losing something in return for benefits in other areas.

and finally, consequence is a general term used to accept what it comes when you make a decision. it can be a positive or negative consequence depending if the decision you took was the correct one.