Which statement is true?

The passage of the 15th Amendment to the Constitution officially changed the method of electing U.S. senators.

The passage of the 17th Amendment to the Constitution officially changed the method of electing U.S. senators.

The passage of the 16th Amendment to the Constitution officially changed the method of electing U.S. senators.

The passage of the 14th Amendment to the Constitution officially changed the method of electing U.S. senators.