What is true regarding datastores on ESXi 6.x?

What is true regarding datastores on ESXi 6.x?

A.
NFS 4.1 datastore does not support Fault Tolerance (FT)

B.
VMFS3 and VMFS5 datastores can be newly created

C.
NFS datastore can be concurrently mounted using NFS 4.1 on one host and NFS on another

D.
NFS 3.0 datastore does not support Fault Tolerance (FT)

Explanation:
VMs on NFS v4.1 support FT, as long as it is the new FT mechanism introduced in 6.0.
VMs running on NFS v4.1 do not support the old, legacy FT mechanism.
In vSphere 6.0, the newer Fault Tolerance mechanism can accommodate symmetric multiprocessor (SMP) virtual machines with up to four vCPUs. Earlier versions
of vSphere used a different technology for Fault Tolerance (now known as legacy FT), with different requirements and characteristics (including a limitation of single
vCPUs for legacy FT VMs).
http://vsphere-land.com/news/nfs-4-1-support-in-vsphere-limitations-and-caveats.html