Which amendment granted women the right to vote?

The 19th Amendment to the United States Constitution, ratified in 1920, is what granted women the right to vote. This amendment explicitly states that the right to vote cannot be denied on the basis of sex, marking a significant victory in the women's suffrage movement. The passage of this amendment followed decades of activism by women who organized, campaigned, and fought for equal voting rights. Thus, it effectively enfranchised women, allowing them full participation in the electoral process, which was a critical step towards achieving gender equality in the United States.

The other amendments mentioned do not pertain specifically to women's voting rights. The 15th Amendment addresses voting rights regardless of race, the 24th Amendment prohibits poll taxes in federal elections, and the 26th Amendment lowers the voting age to 18. Each of these amendments addresses different aspects of voting rights but does not directly concern the enfranchisement of women.