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.