Which of the following describes the 3rd order to the sentry?

• A. To stand at attention.
• B. To report all violations of orders I am instructed to enforce.
• C. To challenge suspicious persons.
• D. To obey all orders without question.

Answer: (C)

The third order to the sentry is about actively checking anyone who approaches the post. It directs the guard to challenge suspicious persons, meaning you stop and question or verify their purpose to determine whether they have legitimate business there. This proactive step is central to maintaining security because it helps prevent unauthorized access before anything escalates, giving you a chance to assess and report as needed. The other possibilities focus on standing still, reporting violations, or obeying orders without question, but they don’t capture the action of actively confronting or challenging someone who appears suspicious.