The equal rights amendment

a was ratified in 1979
b was never ratified
c abolished the poll tax
d granted women the right to vote

Correct

History/details:

The Equal Rights Amendment, formulated as early as 1923 by the National Women's Party, proposed that "equality of rights under the law shall not be abridged by the United States or by any State on account of sex." Feminist groups in the 1960s and 1970s, such as the National Organization for Women, finally succeeded in getting Congress to pass the Equal Rights Amendment as a proposed addition to the US Constitution. It was passed by Congress and sent to the states for ratification in 1972.

The National Organization for Women continued to be a leading voice in pushing for ratification for the amendment. However, conservative groups, especially led by a woman named Phyllis Schlafly, campaigned against ratification. A key point Schlafly focused on was that women would then be subject to military draft and military combat service in the same way as men. This became the key issue and the Equal Rights Amendment failed to achieve the necessary number of states supporting ratification.

B was never ratified

Explanation:

The Equal Rights Amendment, was a proposed amendment to the United States Constitution, but it was not ratified. The ERA was originally written by Alice Paul in 1923, which proposed it unsuccessfully to Congress. In 1972 it was presented again and was approved by the House of Representatives and the Senate, after which it was sent to the legislative chambers of the states for ratification. After a ten-year campaign that polarized public debate in many states, on June 30, 1982, the deadline for ratification expired, so it was not adopted and is not part of the constitution.

b - those executed came from every social and economic class