Between 1945 and 1952, what was one way in which black Americans gained more rights?

Civil Rights Movement

Explanation:

Between 1945 and 1952, CIVIL RIGHT MOVEMENT was one way in which black Americans gained more rights. This was evident in the threatened mass march on Washington by an African American labor leader Phillip Randolph that resulted in President Franklin Roosevelt carrying out an executive order that prohibited discrimination in the military.

Similarly, the National Association for the Advancement of Colored People (NAACP) through the civil rights movement gained some victories at the Supreme Court level in their fight for colored people's rights. In many cases, they mobilized various organizations across the country to force the hand of Congress to pass civil rights legislation.

Another example is the work of the civil rights activists such as Bayard Rustin and George House.

Hence, in this case, the correct answer is "Civil Rights Movement"

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