Final answer:
During the 1920s, the NAACP's primary goal was to reduce racial discrimination and ensure equality in American society, particularly in the workplace, by challenging segregationist policies and supporting litigation aligned with the protections provided by the U.S. Constitution.
Step-by-step explanation:
The main goal of the National Association for the Advancement of Colored People (NAACP) during the 1920s was to end racial discrimination in various facets of American life, including in education, the workplace, and the broader society, through litigation and political lobbying. One of their key strategies was to challenge the Jim Crow laws, which enforced racial segregation, through the judicial system, with the overarching aim of ensuring equality as promised by the 13th, 14th, and 15th Amendments.
It is incorrect to say that the NAACP fought against federally-enforced desegregation plans; rather, they fought against segregationist policies.
Although they were involved in broader societal issues, promoting civil disobedience was not their primary focus during the 1920s; this became a more prominent tactic in the civil rights movement in later decades. Therefore, the correct answer to the question is that the NAACP aimed to reduce racial discrimination in the American workplace and throughout society.