What are two valid use cases for vCenter Server Linked Mode? (Choose two.)

A.
An administrator wants to migrate running virtual machines between vCenter Server instances.

B.
An administrator wants to increase the vRAM entitlement pool.

C.
An administrator wants to manage a virtual server environment and a View environment from
the same pane of glass.

D.
An administrator wants to search all inventory objects across multiple vCenter Server Virtual
Appliance (vCSA) instances from one vSphere Client

Explanation:
http://pubs.vmware.com/vsphere-50/topic/com.vmware.ICbase/PDF/vsphere-esxivcenter-server-50-host-management-guide.pdf(page 53)