Which document guides Navy commands in developing their information assurance workforce?

The correct answer is COMNAVCYBERFORINST 5239.1. This instruction specifically addresses the establishment and development of the information assurance workforce within Navy commands. It provides comprehensive guidelines on how to create, manage, and enhance skills within the information assurance community, ensuring that personnel meet the operational needs and security requirements of the Navy's information systems.

This document is crucial as it lays out the framework for training, certification, and continuous professional development of individuals working in information assurance roles. By focusing on the Navy’s specific needs and policies, it helps to ensure that commands are effectively prepared to protect their information infrastructure.

The other options might relate to information assurance but do not specifically serve the same purpose of guiding commands in workforce development. For instance, DoD Instruction 8500.2 covers broader Department of Defense information assurance policies but is not specific to the Navy's information assurance workforce. NAVCYBERFOR refers to a broader command without directly detailing the development of the workforce, and while IAWF stands for Information Assurance Workforce Framework, it is not a document guiding Navy commands specifically.