Which FM outlines the duties, responsibilities, and authorities of a Noncommissioned Officer?

The correct choice outlines the duties, responsibilities, and authorities of a Noncommissioned Officer (NCO) because it provides a comprehensive overview specifically focused on NCO development, roles, and responsibilities within the Army. FM 7-22.7 serves as a guide that emphasizes the importance of NCOs in leadership and training, detailing the expectations for their conduct and the significant impact they have on their units and soldiers.

In contrast, the other choices cover different topics that do not center specifically on the NCOs. FM 6-22 primarily deals with Army leadership principles and is meant for all leaders, not just NCOs. FM 3-11 focuses on chemical, biological, radiological, and nuclear operations and does not tie back to the specific roles of NCOs. FM 1-0 addresses human resources and is more about the personnel management side of the Army rather than NCO responsibilities. Therefore, FM 7-22.7 stands out as the primary resource dedicated to outlining what is expected of Noncommissioned Officers.