Which document covers Drill and Ceremonies?

The correct choice is substantiated by the fact that TC 3-21.5 specifically addresses Drill and Ceremonies within the U.S. Army. This training circular provides comprehensive guidance on the execution of drill movements and ceremonial procedures, which are fundamental components of military training and discipline.

By focusing on the structured methodology of drill techniques, the document emphasizes the importance of precision and discipline in maintaining unit cohesion and readiness. This resource is widely utilized by units to ensure that soldiers are proficient in their performance during drills and ceremonies, contributing to the overall effectiveness of military operations.

Other documents mentioned, such as TC 3-22.1, FM 3-21.3, and AR 600-20, cover different aspects of Army operations and standards. For example, FM 3-21.3 deals primarily with Infantry platoon and squad operations, while AR 600-20 is focused on Army command policy, including issues related to leadership and the Army's Equal Opportunity program. Therefore, while those documents are crucial for other areas of Army training and policy, TC 3-21.5 is distinctly focused on the topic of Drill and Ceremonies.