Which amendment addresses voting rights regardless of race, color, or previous condition of servitude?

The correct choice addresses the specific concern of voting rights in the context of race and previous conditions of servitude. The Fifteenth Amendment, ratified in 1870, explicitly prohibits the federal and state governments from denying a citizen the right to vote based on "race, color, or previous condition of servitude." This amendment was a significant step in the post-Civil War era to ensure that the newly freed African American men had the legal right to participate in the electoral process.

The other amendments listed deal with different aspects of voting rights. The Nineteenth Amendment grants women the right to vote, emphasizing gender equality in voting but not addressing racial issues directly. The Twenty-fourth Amendment eliminates poll taxes in federal elections, thereby removing a financial barrier that disproportionately affected African American voters and poor individuals, while the Twenty-sixth Amendment lowers the voting age to 18, expanding the electorate to younger citizens. Each of these amendments contributes to the broader civil rights framework but focuses on different facets of voting rights, making the Fifteenth Amendment the correct choice for the specific question regarding race and previous servitude.