In survey terms, a sample is a representative subset of its universe

Closed primaries allow

a. any registered voter to participate, and the voter may ask for a ballot of either party. b. only voters who are registered party members to participate c. voters not enrolled in a political party to choose either ballot. d. voters time to discuss the candidates, choose one, and then vote.

Most PAC money goes overwhelmingly to incumbents because incumbents

A) need more money due to the restraints of being in office. B) have already been ?bought off? by interest groups. C) have already become friends and supporters of lobbyists. D) are the most likely to be able to return the investment. E) have the need for large amounts of money to maintain themselves in power.