What Is the Relationship Between Income and Voting

What is the relationship between income and voting?

A) The lower one's income, the more likely you are to vote.
B) The lower one's income, the more likely you are to be politically knowledgeable.
C) Income appears to have no effect on voting participation.
D) The higher one's income, the more likely you are to vote.
E) The higher one's income, the less you are expected to vote.