Correct Option: C. Executive Detailed Explanation: Under the 1999 Constitution of Nigeria, the power to declare war is primarily vested in the executive branch of government. This is typically the President, who serves as the Commander-in-Chief of the Armed Forces. Here’s a step-by-step breakdown of why this is the correct answer:

1. Constitutional Authority: The 1999 Constitution of Nigeria outlines the roles and responsibilities of the different branches of government. The President, as the head of the executive branch, has the authority to make decisions regarding national defense and military actions, including the declaration of war.
2. Role of the Executive: The executive branch is responsible for the implementation of laws and the administration of the state. This includes managing foreign relations and military operations. The President can make quick decisions regarding military action without the need for immediate legislative approval, which is crucial in times of crisis.
3. Legislative Oversight: While the President has the power to declare war, the legislature (National Assembly) plays a role in overseeing military actions. The President is required to inform the National Assembly of military actions and may need to seek approval for prolonged military engagements. However, the initial decision to declare war rests with the executive.
4. Historical Context: The framers of the 1999 Constitution recognized the need for a swift and decisive response to threats against the nation. By vesting this power in the executive, they aimed to ensure that the country could respond effectively to emergencies without the delays that could occur in legislative processes.

Why Other Options Are Incorrect:

• A. National Security Council:
• The National Security Council is an advisory body that assists the President in making decisions related to national security. However, it does not have the constitutional authority to declare war. Its role is to provide recommendations and support to the President.
• B. Legislature:
• While the legislature has significant powers, including the ability to declare war in some contexts, under the 1999 Constitution, the initial declaration of war is not one of its powers. The legislature can influence military actions through budget approvals and oversight but does not have the authority to declare war independently.
• D. National Council of States:
• The National Council of States is composed of former heads of state, governors, and other key figures. Its role is primarily advisory and does not include the power to declare war. It may discuss national security issues but does not have the constitutional authority to make such declarations.

Summary of Key Points:

• The power to declare war under the 1999 Constitution of Nigeria is vested in the executive branch, specifically the President.
• The President acts as the Commander-in-Chief of the Armed Forces, allowing for swift military decisions.
• The legislature has oversight functions but does not have the authority to declare war independently.
• The National Security Council and National Council of States serve advisory roles and do not possess the power to declare war.

This understanding is crucial for grasping the separation of powers and the roles of different branches of government in Nigeria's constitutional framework.