How do the major parties select their candidates for President of the United States?
 A) Party members select their party’s candidate in a single run-off election.
 B) Party “bosses” choose their party’s candidate at their party’s nominating convention.
 C) All registered voters decide which candidates each party should choose in a national primary election.
 D) After a series of caucuses and primary elections, delegates at each party’s nominating convention choose their candidate.