How Are National and State Party Organizations Interrelated

How are national and state party organizations interrelated?

A) They are part of a hierarchical structure, with the national convention at the top, the national organizations in the middle, and the state organizations at the bottom.
B) They are independent of each other except for the fact that they are all expected to follow the party rules set at the national convention every four years.
C) National organizations finance state organizations, so while they are not officially in charge of them, they often control them through funding.
D) National organizations are in charge of overseeing state organizations and enforcing party rules at all levels of the party.
E) They are independent except for ties in terms of ideologies, campaign money, and party rules.