Which document covers the NCO Guide?

The correct choice refers to TC 7-22.7, which specifically addresses the Noncommissioned Officer (NCO) Guide. This document provides essential guidance on the roles, responsibilities, and expectations of NCOs within the Army, serving as a key resource for their professional development and leadership. It includes information about NCO duties, historical context, and the significance of the NCO corps in the overall structure of the Army.

In the context of the other options, while FM 6-22 covers Army leadership, AR 600-20 deals with Army command policy, and ADP 6-22 outlines the Army's leadership principles, none of these specifically focuses on the NCO Guide like TC 7-22.7 does. Understanding the unique purpose and content of TC 7-22.7 is crucial for anyone preparing for a role as an NCO or involved in NCO training and development.