When configuring a VNX Gateway system, which is a compatible backend storage configuration method?

A.
VNX Gateway system connected to a VNX Block Only system via FCoE

B.
VNX Gateway system connected to a VNX Block Only system via FCiP

C.
VNX Gateway system connected to a Symmetrix system via iSCSI

D.
VNX Gateway system connected to a Symmetrix system via iFCP