Which of the Following Explains Why Minnesota and Wisconsin Tend

Which of the following explains why Minnesota and Wisconsin tend to experience higher voter turnout rates?

A) Residents of Minnesota and Wisconsin participate more often because they are more interested in politics.
B) Both states make it easier to participate by eliminating registration requirements.
C) Both states ease participation restrictions by giving voters the opportunity to register and vote on the same day.
D) Both states ease participation restrictions because they allow residents to register at least six months prior to becoming 18.