Which statement about NPIV is true?

Which statement about NPIV is true?

A.
NPIV provides a means to assign multiple Fibre Channel IDs to a single N-port.

B.
NPIV can be enabled on a per-VSAN basis.

C.
NPIV requires a “write erase” and then reload the switch in order to come up into NPIV mode.

D.
NPIV is a Cisco proprietary feature and as such works only between two Cisco switches.

E.
NPIV must not be enabled on a switch that is also running N-port virtualization.