Who is a military...what are their duties?

Participate in, or support, military operations, such as combat or training operations, or humanitarian or disaster relief.

Operate, maintain, and repair equipment.

Perform technical and support activities.

Supervise junior enlisted personnel.

Explanation:

lollop.

A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. It is typically authorized and maintained by a sovereign state, with its members identifiable by their distinct military uniform.

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c is the correct answer for this question.