what is considered a component unit

A a legally separate government for which the elected official of the primary government are financially accountable

B a large department of a primary government that is financially dependent on the primary government and that the primary government imposes its will on

C a legally separate organization that is financially indpendenet of a primary government and that the primary government cannont impose its will on

D a nonprofit organization that is authorized to operate within the boundaries of a city but is not accountable financially or in any other way to the city?