Which of the Following Statements Most Accurately Describes the Influence

Which of the following statements most accurately describes the influence of political party membership on congressional voting?

A) Because most votes are by straight party line, a member's vote can be easily predicted
B) Although straight party-line voting is rare, party is still a useful predictor of a member's vote
C) Although party-line voting occurs in Congress, party is no longer a usable predictor of a member's vote
D) Political parties no longer influence congressional votes and so are useless as predictors of a member's vote