Which two statements are true regarding upgrading from a Distributed vCenter Server 5.x to vCenter Server 6.x? (Choose two.)
A. vCenter Single Sign-on becomes part of the Platform Services Controller.
B. vCenter Inventory Service becomes part of the Platform Services Controller.
C. The vCenter Server service is not migrated during the upgrade process.
D. The vSphere License Service is migrated to the new vCenter Server 6.x instance.
reference: https://docs.vmware.com/en/VMware-vSphere/6.0/com.vmware.vsphere.upgrade.doc/GUID-4BFB12D8-9FCA-4AB1-A44F-2986966F0AD5.html