Which amendment granted women the right to vote?

The 19th Amendment is the correct choice because it explicitly states that the right to vote cannot be denied or abridged on account of sex. Ratified on August 18, 1920, this amendment marked a significant milestone in the women's suffrage movement in the United States, as it granted women the constitutional right to participate in elections at a national level. This amendment represented the culmination of decades of activism and advocacy by many women who fought for equal voting rights.

In contrast, the other amendments mentioned do not pertain to women's suffrage. The 15th Amendment, for example, was ratified in 1870 and prohibited the government from denying a citizen the right to vote based on "race, color, or previous condition of servitude," but it did not include women. The 24th Amendment, ratified in 1964, eliminated poll taxes in federal elections, which primarily aimed at reducing barriers to voting, particularly for African Americans and poor people, rather than specifically addressing women's voting rights. The 21st Amendment, ratified in 1933, repealed the prohibition of alcohol but is unrelated to voting rights. Thus, the 19th Amendment is the one that specifically granted women the right to vote.