The correct option is B. One of main premises of pluralism is that state is no longer the only actor, rather there are many political actors in international system which are known as nongovernmental organizations or civil society organizations operating at local or international levels. For realist approaches, the states are rational and state interest is the basis for political process as well as military and security issues being main agenda of international relations. Whereas, for pluralists, the subject of rationality of states is a contentious issue, noting the plurality of agenda in the international system.