Concept:The primary guide for Nigeria's foreign policy is the advancement and protection of its own national interest.
Explanation:Nigeria's foreign relations are designed to secure benefits for the nation.
These benefits include economic growth, political influence, security cooperation, and diplomatic goodwill.
Every bilateral or multilateral engagement is weighed against how it supports Nigeria's sovereignty, development, and citizens' welfare.
This principle is called national interest.
It is not about military dominance, self-sufficiency alone, or territorial expansion.
Answer:C. national interest.