Concept:Foreign policy is driven by what a nation seeks to protect or achieve abroad.Explanation:The primary aim of any country’s external relations is to safeguard and promote its own needs, security, and development.This is called the national interest.Interests of other nations, African unity, or former colonial powers are considered only when they support a country’s own national goals.Therefore, the fundamental basis of foreign policy is always the nation’s own interest.Answer:A. national interest