Answer:
b. commander in chief
Step-by-step explanation:
A commander in chief, or supreme commander, is the person who has the supreme command of the whole or a significant part of the armed forces of a nation or, sometimes, of several allied nations. In most countries this position is exercised by the head of state or the head of government through the Minister of Defense or similar, thereby reinforcing the notion that it is the civil and political authority that is in charge of the armed forces.