Why did the issue of voting lead to another constitutional amendment in the late 1800s?

After the Civil War, Congress adopted the Fifteenth Amendment in 1870 to protect African American men’s right to vote. It prohibited denying the vote because of race, color, or previous enslavement, responding to fears that white Southerners would prevent African Americans from voting. The correct choice is “Congress was worried that White Southerners would stop African Americans from voting.”

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