Which of the Following Is True of the Fifteenth Amendment

Which of the following is true of the Fifteenth amendment of the provisions of the U.S.Constitution?

A) It requires that U.S.senators be chosen directly by a state's voters rather than its legislatures.
B) It states that state governments cannot deny franchise based on "race, color, or previous condition of servitude."
C) It guarantees women the right to vote.
D) It prohibits states from requiring voters to pay a poll tax.
E) It prevents states from denying the vote to otherwise qualified persons aged 18 or older.