What Is the National Interest

What is the national interest?

A) It is unimportant to realists, because it is not based on the concept that a state is a unitary and rational actor.
B) It is a foreign policy goal that is objectively valuable for the overall well-being of the state.
C) It implies that a state is a collection of actors and interests.
D) It is based on the concept that the state is a unitary and rational actor, so there is very little debate about how the national interest should be defined.