Franz Ferdinad was assassinated.
People would retaliate against other abolitionist leaders. Southern states began to form militias, which late became the Army of the Confederacy.
Answer:
4. create more jobs
Explanation:
Federal spending on public works makes construction jobs which will successfully reduce the unemployment rate
Counties support the state government by using a Bicameral system creating to side branches such as the federal of state have, but this branch passes on laws that can be signed by other States giving them that thier state/counties are eligable to do what ever act the government has givien them, such as Formal President Barack Obama gave and signed the ObamaCare Act, and many States/Counties signed for as well.
Brown v. Board of Education was a landmark case in which it was finally proven that segregation in institutions of education was highly unconstitutional, so you could say that that is the greatest effect since it made other schools become open for everyone as well.