Scenario: An administrator wishes to add disaster recovery capability to an existing XenApp environment. The administrator built some new servers into a disaster recovery datacenter that has a 1 GB link to the production datacenter.
How should the administrator configure the new servers for users?
To configure the new servers for disaster recovery with a 1 GB link to the production datacenter, the administrator should add the servers to the existing farm into a new disaster recovery zone and use a preferential load balancing policy. This approach ensures that the disaster recovery servers are correctly segmented and can be prioritized appropriately, optimizing network performance and resource allocation between the primary and disaster recovery data centers.
D is Correct
I think is also D if we are talking about XenApp (legacy versions)
I'd say this is "D": Zone types A Site always has one primary zone. It can also optionally have one or more satellite zones. Satellite zones can be used for disaster recovery, geographically-distant datacenters, branch offices, a cloud, or an availability zone in a cloud. https://docs.citrix.com/en-us/xenapp-and-xendesktop/7-15-ltsr/manage-deployment/zones.html