Which amendment to the Constitution granted women's suffrage?

The Nineteenth Amendment to the Constitution is the correct answer because it explicitly states that the right to vote cannot be denied or abridged on the basis of sex. Ratified in 1920, this amendment marked a significant victory in the women's suffrage movement, ensuring that women had the legal right to participate in elections. This was a crucial step in the broader fight for gender equality in the United States, reflecting decades of activism and advocacy that sought to address systemic disenfranchisement based on gender.

In contrast, the Fifteenth Amendment addresses voting rights regardless of race, color, or previous condition of servitude, thus focusing on racial equality but not gender. The Thirteenth Amendment abolished slavery and involuntary servitude, while the Twenty-fourth Amendment prohibits the use of poll taxes in federal elections, neither of which pertain specifically to women's voting rights. Therefore, the Nineteenth Amendment uniquely enshrines the right to vote for women in the U.S. Constitution.