The citizens of 1930s Germany and 1970s Cambodia dealt with ruthless dictators and corrupt, vicious governments. The Nazis and the Khmer Rouge turned their countries into police states, with frequent arrests and violence.
It was "Austria-Hungary’s invasion of Serbia" that was one of the military actions that led to the start of World War I, since this was a blatant violation of sovereignty.
Answer: C) African-Americans experienced an improved level of civil rights, including the desegregation of the military and the federal government.
The presidency of Harry S Truman saw a lot of improvement to the civil rights of African Americans. The president established the President's Committee on Civil Rights which was tasked with examining the condition of civil rights in the United States.
President Truman, based on their recommendations, signed executive orders 9980 and 9981. These ordered the desegregation of the federal work force and of the armed forces.
I believe that is going to be #'s 2 and 3