Which are the two network requirements for a VMware vSA…

Which are the two network requirements for a VMware vSAN 6.5 cluster? (Choose two.)

A.
Multicast must be enabled on the physical switches and routers that handle vSAN traffic.

B.
vSAN requires IPv6 only.

C.
All hosts must have a dedicated 40GbE NIC.

D.
The vSAN network supported IPv4 or IPv6.

E.
vSAN requires IPv4 only.

Explanation:
The vSAN network supports both IPv4 and IPv6.
https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUIDAFF133BC-F4B6-4753-815F-20D3D752D898.html
http://cormachogan.com/2014/01/21/vsan-part-15-multicast-requirement-for-networking-misconfigurationdetected/