How many amendments does the Constitution have concerning voting rights?

The correct choice is four amendments concerning voting rights. The U.S. Constitution has several specific amendments that protect and expand voting rights for various groups of people.

The 15th Amendment prohibits the federal and state governments from denying a citizen the right to vote based on "race, color, or previous condition of servitude." The 19th Amendment grants women the right to vote, prohibiting any U.S. citizen from being denied the right to vote on the basis of sex. The 24th Amendment prohibits the use of poll taxes in federal elections, which were used to restrict voting rights for low-income individuals. Lastly, the 26th Amendment lowers the voting age to 18, ensuring that younger citizens can participate in elections.

The other given options do not accurately reflect the number of amendments connected specifically to voting rights. Thus, the choice of four is correct, as it encompasses the fundamental amendments that address and protect the right to vote in the United States.