How Are Nonstate Actors Unlike State Actors

How are nonstate actors unlike state actors?

A) Nonstate actors lack identifiable interests.
B) Conflict with nonstate actors tends to be "cheap" for the state.
C) Institutions cannot be used to resolve the grievances between two states.
D) Nonstate actors deal with unique concerns about mobilizing their members.
E) Nonstate actors cannot be fruitfully thought of in the context of a bargaining model.