An architect is designing a new vSphere platform for a customer to meet the following requirements:
✑ The platform must be deployed into five physically separate sites.
✑ The sites are spread across multiple regions.
✑ Some sites require more than one vCenter Server.
✑ The platform must provide an administrator with the ability to access virtual infrastructure components across all sites from a single management tool instance.
Which single sign-on (SSO) design recommendation will meet these requirements?
A . Use an SSO domain across all vCenter Server instances
B . Use an SSO domain per region
C . Use an SSO domain per vCenter Server instance
D . Use an SSO domain per site