Answer:
A. He believed that African American loyalty would be rewarded with better treatment when they returned home to the U.S.
Explanation:
In the aftermath of World War I, W.E.B. DuBois urged returning soldiers to continue fighting for democracy at home.
A dispute over a contract between two people in the same city would most likely be heard first in a "local court", unless of course the dispute is over something very serious, such as a violent crime.
It was called isolationism :D