Which of the Following Factors Accounts for Relatively Low Voter

Which of the following factors accounts for relatively low voter turnout rates in the U.S.?

A) Political parties in the U.S.are relatively weaker than they are in other countries.
B) Church attendance in the U.S.is relatively higher than it is in other countries.
C) Voter registration requirements are simpler in the U.S.than in other countries.
D) Political parties in the U.S.are stronger than they are in most other countries.
E) All of the above