Which statement best completes the list showing the steps in the presidential election process

1. potetial presidential candidates form exploratary committees

2.?

3. candidates for each party compete in general elections

A. national conventions are held to select candidates for the primary elections

B. members of the electoral college formally select the president of the United States

C. the senate approves a list of candidates for each party's presidential nomination

D. parties select their presidential candidates through primaries and caucuses