According to the ServiceNow Resource Management document, users with the pps_resource role can be considered for resource planning, as this role grants access to the Resource Management application and allows the users to view and update their resource allocations. The other options are not correct, as they are not roles that are related to resource planning. The it_project_user role grants access to the Project Portfolio Management application and allows the users to create and update projects. The it_user role grants access to the IT Service Management application and allows the users to manage incidents, problems, and changes. The it_pps_user role grants access to the Project Portfolio Suite application and allows the users to manage portfolios, programs, and projects.