Explanation
According to the PMBOK Guide 7th Edition, the resource management plan is a component of the project management plan that describes how the project resources are acquired, allocated, monitored, and controlled.
The resource management plan also includes the resource breakdown structure (RBS), which is a hierarchical representation of the project resources by category and type. The project manager should use the resource management plan and the RBSto identify the impacts of the other projects on the availability and utilization of the shared resources, and to plan accordingly. The project manager should also communicate with the resource managers and the project sponsors of the other projects to negotiate and resolve any resource conflicts or issues. Therefore, the best answer is B. References: PMBOK Guide 7th Edition, pages 15, 16, 57, 58, 59.