I would say A, mostly because of the immigration south and people wanting to start their own governments and society’s
It would be primarily in a "socialist" economic system that the government controls the businesses that affect most citizens, such as railroads and electrical power, since wealth in this system is largely "redistributed" through the federal system.
This is because it was when the Allies were able to defeat the Axis powers, which gave hope to the Allies to fight stronger. Also, when they defeated Axis powers at that battle, they(ALLIES), now had vantage points on both sides of Germany; east(UK) and west (Russia).
Because the Silk Road established steady trade
Answer: B. the Delian League
hope this helps