The effects of poststructuralism on International Relations felt in the early 1980s through the works of Richard Ashley, Robert Walker, Der Derrian and Michael Shapiro. Among these writers, Ashley and Walker designed their works to expose the imaginative boundaries and limitations drawn by traditionalist approaches to understand the domain of world politics through certain concepts (state, sovereignty, etc.). In other words, poststructuralism has problems with restrictive assumptions like the nature of international system which is anarchic and, restricts the actions of sovereign nation states. At first sight, these characterisations are generally accounted with the doctrine of realism or neorealism. Poststructuralist criticism is not only limited with these theories, but also contains an ahistorical perspective, problematic nature of sovereignty, universalism, timeless and unshakeable foundations. As can be understood from the information given, the correct answer is E.