It’s may be B. That makes the most sense in my opinion.
Khan's armies may have slaughtered more people than Joseph Stalin and Adolf Hitler's combined. His military campaigns sometimes involved eliminating an entire civilian population. As many as 40 million people were killed under his rule.
Answer:
A. increased encroachment of white settlers onto American Indian lands
C. the movement of American Indians to eastern cities
Explanation:
The homestead act was a policy by the united states government to provide land for potential settlers that just come into untied states territory.
This problem is, large part of the lands from this act belong to the native Americans. So, this act basically take their ancestral by force to provide room for white settlers on american Indian land.
Because of this, the natives started to scatter all across the countries. Many of them decided to move to eastern cities in the hope of finding a new way of survive.
You would just multiply across for example

Then simplifiy if needed
The answer is letter C.
Explanation: The America First Committee was the main US non-interventionist lobbying group against US entry into World War II.
The were form in 1940 to oppose America's potential intervention in the war. The committee said that the number of memberships were 800,000 and attracted leaders such as General Robert E. Wood, the aviator Charles A. Lindbergh, and Senator Gerald P. Nye.