In liberalism, the political and economic behaviors cannot be separated from each other. It is impossible to categorize them as two distinct issue areas. The liberal reading of IR is composed of both conflictual and cooperative behaviors of states, non-state entities and individuals. Also, liberalism has criticized realism’s inadequacy to explain international cooperation and argues that the realist analyses are confined with the limits of narrow definitions of the national interest. The liberal scholars were affected by the international circumstances around them such as the Cold War or the increasing effects of globalization. Correct answer is C.