Answer: Option (D) is correct.
Explanation:
Individuals who tend to be known as political realists usually follow the theory of political realism. Political realism is referred to as a theory under political philosophy that tends to analyze, explain, and describe political relations using models. It thoroughly takes up the assumption that political strength is considered to be the primary end of an action(political). They believe that policy which are in terms with foreign relations must be inclined towards protecting national interest.