The correct answer is C. Mutiny.
A mutiny is an open rebellion of soldiers or sailors against lawful authority. It is a serious crime that can result in severe punishment, including death.
A revolt is an armed uprising against the established government. It is often motivated by political or religious beliefs.
A revolution is a fundamental change in the political organization of a society, usually in the form of a radical change in government. It is often accompanied by violence and social upheaval.
Anarchy is a state of disorder and lawlessness. It is often characterized by the absence of government or effective control.
In the context of the question, the only option that describes an open rebellion of soldiers and sailors against lawful authority is mutiny.