They wanted to find better jobs and to escape segregation. They were bitterly treated still after the war from the southern elite and white poors' so they probably wanted to be with the people who had fought a war for them. They were seeking better lives.
Hinduism grew out of Brahmanism. It became so popular because of its ability to absorb the influence of other religions and because it was generally so tolerable.
"Its purpose was to act as a forum for solving international problems": Its main goal was to avoid conflicts between nations, as they have previously proved to be costly.
"President Woodrow Wilson proposed its formation in his Fourteen Points.": During his address in Congress on January 8th, 1918, President Wilson suggested the creation of this intergovernmental organization.
"The US Congress never ratified its charter.": Despite Wilson efforts to promote the League, US Congress would never ratify the proposal and the United States never effectively joined.
"a. It freed number of British troops to fight in North America" would be the best option in terms of the effect that the end of the British war with France had in the war of 1812, since manpower was increased.