The September 11 terrorist attacks occur. Terrorism becomes a major concern in U.S. foreign policy.
Option D is correct The aftermath of the Cold War is the major U.S. foreign policy priority.
The goals and actions that a state takes in relation to its interactions with other states, unions, and other political bodies, whether on a bilateral or multilateral basis, constitute its foreign policy or external policy.
The basic goal of foreign policy is to employ diplomacy to resolve global issues by talking, meeting, and reaching agreements.
Hence, Option D is correct.