What type of duties are usually included in a soldier's regular job description?

The correct answer focuses on "standard duties," which refer to the routine responsibilities that a soldier is expected to perform as part of their assigned military occupation. These duties are typically detailed in the soldier's job description and include tasks and responsibilities inherent to their role.

Standard duties ensure that soldiers understand the core expectations of their positions and maintain operational readiness. They encompass a range of activities that collectively contribute to the training, readiness, and effectiveness of the unit. By grounding their roles in these duties, soldiers can focus on essential skills necessary for their jobs and the mission at hand.

In contrast, other types of duties mentioned may not represent the core responsibilities outlined in a soldier's job description. Directed duties are tasks given directly from a superior and may vary based on immediate mission needs rather than being fundamental to the soldier's role. Assigned duties may suggest specific responsibilities that are designated, but they can be temporary and not part of a regular job description. Volunteer duties involve tasks that soldiers take on voluntarily, which could vary significantly and are usually outside their primary job functions.