Which publications establish and provide instructions and standards for Army doctrine?

The correct answer emphasizes the role of Army Doctrine Publications (ADP) in establishing and providing the necessary instructions and standards for Army doctrine. ADPs serve as foundational documents that outline the Army's operational concepts, guiding principles, and overall approaches to various missions and functions. These publications are designed to present a broad outline of the Army's doctrine, ensuring that all personnel are aligned with the overarching strategies and principles that govern their actions.

In contrast, the other types of publications play different roles. Technical Manuals (TM) primarily focus on specific equipment and operational procedures, detailing maintenance, troubleshooting, and operational use rather than overarching doctrine. Field Manuals (FM), while providing useful tactics, techniques, and procedures for specific missions, do not serve the same foundational purpose as ADPs; instead, they often elaborate on the principles defined in ADPs. Ammunition Publications (AP) specifically deal with topics related to ammunition management, logistics, and safety, which is a more specialized subject area rather than Army-wide doctrine. Thus, Army Doctrine Publications are indeed the primary resources that lay the groundwork for Army doctrine.