I think it was the:
Civil Rights Act
The Civil Rights Act of 1957 was passed in order to make sure that all
Americans could exercise their right to vote. It was the first civil
rights legislation passed since reconstruction. Its enactment also came after African Americans were increasingly targeted with violence following the U.S. Supreme Court’s Brown v. Board of Education decision ending segregation in schools. The law showed a renewed national attention to
guaranteeing civil rights to all Americans. In addition, it established the Commission on Civil Rights, a federal oversight committee that examined opinions of the public and state laws regarding civil rights.
She developed a new strategy to pursue women's voting rights
The Answer to this question is "B"
The Democratic Party lost popularity and the 1952 election because of U.S. involvement in Korea. The heavy cost of the war in terms of money and American lives and the failure to win the war were partial reasons for the loss.