Final answer:
Eleanor Roosevelt resigned from the Daughters of the American Revolution and arranged for Marian Anderson to sing at the Lincoln Memorial after Anderson was barred from singing at the DAR's Constitution Hall due to racial discrimination.
Step-by-step explanation:
As a result of the Daughters of the American Revolution not allowing Marian Anderson to sing at their event, Eleanor Roosevelt took a significant and commendable action. Feeling strongly that Anderson's ban was unjust because of racial discrimination, Eleanor Roosevelt resigned from the Daughters of the American Revolution (DAR). Furthermore, determined to right the wrong she felt had been done, Eleanor Roosevelt arranged for Anderson to sing at a highly public and symbolic concert on the steps of the Lincoln Memorial, an act which not only catapulted Anderson into the national spotlight but also stood as a statement for civil rights during that era.