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.