What are two prerequisites for installing the vCenter Server application?

What are two prerequisites for installing the vCenter Server application? (Choose two.)

A.
The system vCenter Server is installed on must be a physical machine.

B.
A valid vSphere vCenter license must be obtained before installation.

C.
vCenter must be in the same network as the hosts if supporting vSphere Storage Appliance
Cluster.

D.
The system vCenter Server is installed on cannot be a domain controller.

Explanation:
https://pubs.vmware.com/vsphere-4-esxvcenter/index.jsp?topic=/com.vmware.vsphere.installclassic.doc_41/common/install/c_vc_pre.html