Tom and Harry cleaned and mopped the floor. Explanation: On the one hand, a compound subject is a subject made up of two simple subjects which are joined by a coordinating conjunction and have the same predicate
It was the first multicultural empire in history. It was also the first very large empire. Because of this the Empire had to develop ways of running effectively. Roads were built over great distances. Standardize currency. Localized governing systems (i.e. satrapies). It was also the first time Asian powers attempted to invade Europe.
Correct answer: Court cases challenged the legality of discrimination.
I'll mention key court cases after debunking the other answers in the list. Truman's desegregation of the armed forces happened already in 1948, and impacted only those in the armed forces, rather than all African Americans. The suburbs were NOT welcoming toward African Americans, and they remained in living mostly in urban centers.
As to key court cases of the 1950s regarding discrimination:
1950: Sweatt v. Painter and McLaurin v. Oklahoma State Regents. In these cases, the Supreme Court said segregation of African American students in law and graduate schools was unconstitutional. This was the start of challenging "separate-but-equal" policies.
1954: Brown v. Board of Education. Firm decision that "separate but equal" policies were unconstitutional across the education system. Chief Justice Earl Warren, speaking for the unanimous opinion of the Court, said: “Separate educational facilities are inherently unequal.”
1955: Brown v. Board II. The Supreme Court directed that school systems must abolish segregation “with all deliberate speed.”
1956: The Supreme Court affirmed a lower court ruling that the segregation of the Montgomery, Alabama, bus system was illegal. This was in reference to the bus boycott that had begun with the protest by Rosa Parks.
1958: Cooper v. Aaron. The Supreme Court upheld the US Court of Appeals (8th Circuit) decision that resistance by local officials and threats of violence in the community did not justify delaying desegregation. This followed in the wake of the Little Rock Nine (a group of black students) seeking enrollment in LIttle Rock Central High School.
After the defeat of Japan in World War II, the United States led the Allies in the occupation and rehabilitation of the Japanese state. Between the years 1945 and 1952, the U.S. occupying forces, led by General Douglas A. MacArthur, enacted widespread military, political, economic, and social reforms.
Scenario C: Electrolytes.