Why is this the best design for the XenServer resource pools?

A.
This design addresses all of the customer requirements by ensuring appropriate design of resource pools, high availability for critical workloads, such as the
database server, as well as incorporating the new storage solution for disaster recovery purposes. This also takes into account server OS machine and desktop
OS machine characteristics.

B.
This design is the most suitable since it ensures simple setup with redundancy and meets the requirement of separating the operating system types.

C.
The resource pools are based on roles, and workloads can be moved from one resource pool to another in case of maintenance as well as for disaster recovery
purposes.

D.
This design is best suitable to the customer requirements because the separation of server workloads and virtual desktop workloads in different resource pools
optimizes the performance and high availability.