The Purpose of the National Committees of Both Major Parties

The purpose of the national committees of both major parties is to

A) determine the ideology or political positions of the party for the next national convention.
B) conduct the business of the party during the four years between national conventions.
C) keep local parties and candidates in line with the national party during presidential election years.
D) recommend potential party candidates for Congress and the presidency.
E) pick selection criteria for the party's nomination process.