Questions: The Fifteenth Amendment prohibited only southern state governments from denying any citizen the right to vote because of race.

The answer is False: The Fifteenth Amendment prohibited only southern state governments from denying any citizen the right to vote because of race.

Explanation: The Fifteenth Amendment to the United States Constitution, ratified in 1870, states: "The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of race, color, or previous condition of servitude." This amendment applies to all states, not just southern states. Its purpose was to ensure that no citizen would be denied the right to vote based on race, color, or previous condition of servitude, thereby extending voting rights to African American men across the entire country.