Question: Which of the following is the primary difference between realism and neorealism? O a. Realists focus on national security issues, whereas neorealists focus on economic matters. O b. Neorealists believe that states are naturally cooperative, whereas realists believe that states are naturally competitive. O c. Neorealists believe that international anarchy, not the selfish nature of individuals, is responsible for the competitive nature of sta interactions. O d. Realists focus on the selfish nature of individuals, whereas neorealists believe human beings are naturally cooperative.