The answer should be the first one : a return to normalcy and isolationism. The reason for this is because they wanted to keep out of foreign affairs from there on out. Obviously that did not work out as well as hoped since Americans were forced into the 2nd World War as well as the Korean and Vietnamese wars. Hope this helps!
Their weapons were much more advanced ex. guns, rather than the natives had bows and arrows.
Well, Black codes kept place people from voting, probably causing a seince of inferiority for African Americans.
If your question is:
What was the reason behind the incident described in this passage?
a. Ethnic conflict in the Ottoman empire
b. Extreme militarism in Germany
c. Serbian nationalism
d. Economic competition between France and Germany
I think the answer is d. Economic competition between France and Germany.