Which two statements about vCenter HA are correct?

Which two statements about vCenter HA are correct? (Choose two.)

A.
ESXi 5.5 or later is required.

B.
vCenter HA network latency between nodes must be less than 50 ms.

C.
NFS datastore is supported.

D.
It must be deployed on a 3 ESXi host cluster with DRS enabled.

Explanation:
https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.avail.doc/GUID-8FD87389-
8CC9-4298-8B08-A1526FB44524.html