Which document provides official deployment plans and guidelines?

The Deployment Authorization Order (DAO) is the correct answer because it serves as the official directive that outlines deployment plans and guidelines for military operations. This document is critical as it authorizes and details the specific requirements for deployment, ensuring that all relevant personnel and resources are prepared and coordinated effectively. It contains vital information such as deployment timelines, unit responsibilities, and any specific constraints or considerations that must be adhered to during the deployment process.

In contrast, other options like the Unit Readiness Report (URR) focus on assessing and reporting a unit's readiness status rather than providing deployment plans. The Operational Readiness Evaluation (ORE) is more about evaluating a unit's performance and capabilities rather than serving as a deployment directive, while the Resource Allocation Document (RAD) deals with the distribution and management of resources, which may support deployments but does not itself provide the official plans or guidelines needed for deployment orders.