Which amendment grants women the right to vote?

The 19th Amendment is significant because it specifically states that the right to vote cannot be denied or abridged on account of sex. Ratified in 1920, this amendment was a landmark achievement in the women's suffrage movement, ensuring that women had the legal right to participate in elections.

In contrast, the 15th Amendment, which was ratified in 1870, addressed the voting rights of citizens regardless of race, color, or previous condition of servitude, but it did not include provisions for gender equality. The 24th Amendment, ratified in 1964, eliminated poll taxes in federal elections, and the 26th Amendment, ratified in 1971, lowered the voting age to 18. While these amendments are important in the context of voting rights, they do not specifically grant women the right to vote, which makes the 19th Amendment the correct answer.