The Role of "Party Organization" Refers to the ___

The role of "party organization" refers to the ___ .

A) volunteers who freely serve on a part-time basis to interface with the public on efforts to "get out the vote" on election day
B) representatives of the party who serve on interest group boards to coordinate political campaign support on a day-to-day basis
C) officials appointed by the party and who have been confirmed by the Senate to staff the federal bureaucracy
D) permanent structure of party offices and officials who administer the party apparatus on a day-to-day basis