Which of the following would be MOST helpful in creating project roles and resource requirements?

A Responsibility Assignment Matrix (RAM) defines roles and responsibilities for already identified work packages and tasks, rather than helping to create the initial roles and requirements.

A Project Charter authorizes the project and names the project manager, but it does not detail specific project roles or resource requirements.

The Work Breakdown Structure (WBS) decomposes the total scope of work into smaller, more manageable components, making it easier to define specific tasks and subsequently identify the roles and types of resources required to complete each task or work package. By understanding the granular work, project managers can accurately estimate the human and non-human resource needs and assign appropriate roles.

A Human Resources Plan describes how to acquire, develop, manage, and release project team members, but it is developed after the initial roles and resource requirements have been largely identified.