C) Great Britain
The Treaty of Paris of 1763 resulted in France forfeiting most of their north american land. They gave all their land to the east of the Mississippi river over to British rule within the British colonies.
The answer that would make the most sense is bipolar disorder.
The main reason we didn't join the League of nations is because we had the policy of isolationism
isolationism = America wants to focus on ourselves, we want to stay out of trouble
Reliance on individual activity I believe