21. In 1930, the NAACP commissioned Nathan Margold to develop a strategy for ending racial discrimination and segregation that the Court ruled was constitutional in Plessy v. Ferguson.Based on your knowledge of the NAACP's strategy, what did Margold provide to the NAACP? A. a proposal to attack the separate but equal doctrine by challenging discrimination through the court system B. a proposal to focus on steady economic development of the African American community rather than confrontation C. a proposal to organize a march on Washington DC, to demand the end of segregation in the defense industry D. a proposal to help African Americans escape the effects of segregation by facilitating their emigration to Africa