What are the characteristics of the Initiator groups on Symmetrix storage arrays running Enginuity 5876?

A.
Contains fibre WWNs or iSCSI names, an initiator may belong to only one group, can be cascaded one
deep.

B.
Can be cascaded one deep, either fibre WWNs or iSCSI names, an HBA may belong to many groups.

C.
HBAs belongs to one group, Contains fibre WWNs or iSCSI names, can be cascaded more than one deep.

D.
Contain up to 32 entries, an initiator may belong to many groups, can be cascaded one deep.