What clustered file system (s) are supported for storage poolthat will be shared In Oracle VM?

What clustered file system (s) are supported for storage poolthat will be shared In Oracle
VM?

A.
GFS only

B.
GFS and NFS only

C.
OCFS2 only

D.
OCFS2 and GFS only

E.
GFS, OCFS2 and NFS

F.
NFS only