What was the importance of the 15th Amendment to the civil rights movement?

The 15th Amendment prohibited denying a citizen the right to vote because of race, color, or previous enslavement. It was important to the civil rights movement because it sought to secure voting rights for African American men. Choice A is the closest match, though the amendment did not guarantee voting rights to literally all Americans; women, for example, were not guaranteed the right to vote until the 19th Amendment.

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