What did the Fifteenth Amendment guarantee?

The Fifteenth Amendment to the United States Constitution, ratified in 1870, guarantees the right to vote specifically regardless of race, color, or previous condition of servitude. This amendment was a significant step in the fight for civil rights, particularly for African American men, who were often disenfranchised due to discriminatory practices. By explicitly prohibiting the denial of voting rights based on race, the amendment aimed to ensure that all citizens, particularly those who had been formerly enslaved, had an equal opportunity to participate in the democratic process. The focus on race as a factor for voting rights is what makes this option the correct answer, as it directly addresses the primary concern of the amendment's intent.