Which official documents are managed under the DON Directives Issuance System?

The correct choice indicates that Instructions and Directives are the official documents managed under the Department of the Navy (DON) Directives Issuance System. This system is specifically designed to ensure that the Navy's policies, procedural guidelines, and operational mandates are effectively communicated and implemented throughout the organization.

Instructions provide detailed information about how to achieve the objectives of a directive, outlining specific actions and responsibilities. Directives convey important policy decisions and strategic guidance from the higher authority. Therefore, the focus on Instructions and Directives captures the essence of the documentation system's purpose, which is to ensure compliance with the Navy's policies in various operational scenarios.

The other options, while related to Navy operations and management, do not encapsulate the full scope of what the DON Directives Issuance System is responsible for. For instance, Policies and Procedures and Operational Guidelines may be part of broader organizational practices but are not strictly categorized under this specific system. Naval Orders, while crucial for operations, represent a different form of communication and command that falls outside the purview of the directives issuance framework.