The Fifteenth Amendment...

   

• prohibited state governments from using property requirements to disqualify blacks from voting.
• gave the full vote to all adult African Americans.
• prohibited state governments from using literacy tests and poll taxes to prevent blacks from voting.
• forbade states from denying any citizen the right to vote on the grounds of race, color, or previous condition as a slave. 

ANSWER: The Fifteenth Amendment forbade states from denying any citizen the right to vote on the grounds of race, color, or previous condition as a slave.