Final answer:
A sentry has a maximum of 7 general orders that they must follow while on duty.
Step-by-step explanation:
The correct answer is C. 7. A sentry has a total of 7 general orders. These general orders are a set of instructions and guidelines that a sentry must follow while on duty to ensure the security and safety of the area they are guarding. They include orders such as 'To take charge of this post and all government property in view' and 'To walk my post in a military manner, keeping always on the alert and observing everything that takes place within sight or hearing'.