The answers are the following:
Question 4. The correct answer is D. The main opposition to the League of Nations by some senators was the fact that, in case of external attack, all members of the League were bound to defend its members. This would eventually draw the USA into international conflicts.
Question 5. The correct answer is B. After the war, Native Americans were granted American Citizenship. Native Americans fought for a country that still denied most of them the right to participate in politics. As a result, Congress granted citizenship to those Native Veterans who were not yet citizens.
Question 6. The correct answer is B: Passing of Espionage Act. The Act was intended to prohibit interference with recruitment and military operations, to prevent insubordination or support to US enemies during the war. German-Americans were not strongly connected to Germany at that time, and they feared being mistreated, so they remained neutral. Political parties and unions also remained neutral, although poor farming areas resented the war, claiming that it would be the poor who would fight a war for the rich.
Question 13. The correct answer is C. The process of demobilization caused high unemployment. Demobilized soldiers displaced many from their work positions, and many war-related factories were closed.
Question 14. The correct answer is B. During World War I, German citizens were considered "enemy aliens". German-born male residents were required to register at their local post office, to carry their registration card at all times, and to report any change of address or work. These regulations were lated extended to include women.
Question 15. The correct answer is A. Many diseases were spread among soldiers on both sides as a consequence of living in the trenches. Trench foot (a condition caused by exposure of feet to damp, unsanitary conditions), trench fever, shell shock, lice and cooties, are some of the diseases that affected soldiers.
Question 16. The correct answer is C. Publishers such as Joseph Pulitzer and William Hearst agitated public opinion by means of Anti-Spanish Propaganda.
Question 18. The correct answer is A. As a result of the political, social and economic situation in the South, many African Americans migrated to the North, to live in the big cities. Flourishing factories that were low on workforce, welcomed African Americans to work in factories, and work on the positions that women and immigrants were not able to fill.
