What is the First Order of the Sentry?

The statement "To take charge of this post and all government property in view" is indeed the correct answer because it encapsulates the primary responsibility of a sentry. This directive emphasizes the sentry's role in assuming command of their assigned area, ensuring the security and protection of both the post itself and any government property visible within that jurisdiction.

Understanding the significance of this first order is crucial for a sentry's effectiveness. It underscores the importance of vigilance and accountability, as the sentry must not only guard against external threats but also manage the environment they are tasked to oversee. This foundational command sets the stage for all subsequent duties, establishing the necessity of readiness and control.

Other options may involve responsibilities that a sentry could encounter, such as monitoring for suspicious activity or following directives from superiors, but they do not articulate the primary charge a sentry has upon assuming their post. The first order lays the groundwork for their role and importance in maintaining security and order.