Political parties are primarily defined in which of the following ways?

A. a candidate

B. a state

C. a law

D. an issue

B) - no, parties function in many states.

C) - no, they can have as their goal to change a low or to introduce a new law, but this is not central to parties

A) - now, this can happen for some parties, such as "John Smith for president party" but not for all parties: sometimes true

D - this is the best answer : the issues can be migration, abortion, etc.