The correct response is:
Article II, Section 2 gives the president the role of commander in chief.
This section of the Constitution establishes the president as the leader of the armed forces, which is crucial for effective national defense. By designating the president as commander in chief, the Constitution ensures that there is a single, authoritative figure responsible for military decisions, allowing for more coordinated and decisive action in times of war or crisis. This provision helps maintain a strong and responsive military presence, thereby providing for the common defense of the nation.