The answer is C. both the above
The movement of voters between each political party could either damage or guaranteed the representative chance for victory. And the period before the general election is perfect for the candidates to persuade other voters because moderate voters tend to be predominantly involved in this period. After entering the primary, more extreme and loyalist voters will start to show up.
It sent their economies into further decline--European countries had invested in our stock market and they relied on our financial assistance following the war.
Germany was relying on circular loans from the US which provided funds to help them pay for reparations. After the stock market crash, we were no longer able to aid which stopped money from flowing into Europe. This caused further decline in Europe preventing them from investing in their own countries let along buy goods from the US.
I read a book series on this subject and I'm pretty sure its D. All of the above. Because many African Americans were indeed looking for job opportunities instead of being slaves and working on plantations, would face rarely any harsh racism there, and well the government didn't exactly help but there was many operations aiding the move.