What type of project structure is hierarchically organized depiction of the resources by type?

A.
What type of project structure is hierarchically organized depiction of the resources by type?

B.
Resource Breakdown structure (RBS)

C.
Work Breakdown Structure (WBS)

D.
Project Breakdown Structure (PBS)

Explanation:
A Resource Breakdown Structure (RBS) is used to create an hierarchical list of the resources. There are organizational and geographical RBS. Activity lists, resource calendar, and resource estimating are the major RBS tools.
Resource Breakdown Structure or RBS is an integral part of any effective project management in geneal and resource management in particular. Managing any project means organizing project resources and project components, such as the project team members, to ensure that they are strategically productive throughout the lifecycle of the project.

RBS Tools
Activity List creating a list of all the project-based activities and every conceivable information about them. This includes the usual resources employed by the listed activities.
Resource Calendar making a list of diverse resources regarding their availability over a period of time to ascertain whether they can be assigned for particular projects.
Resource Estimating making estimates regarding the variety/volumes of resources that would be employed for each defined activity in the most cost-effective and productive manner.