When proposing SnapManager for Exchange, what are the minimum licenses required?

A.
SnapManager for Exchange SnapDrive SnapRestore FCP or iSCSI
B.
SnapManager for Exchange SnapDrive SnapRestore CIFS FCP or iSCSI
C.
SnapManager for Exchange SnapDrive Single Mailbox Recovery FCP or iSCSI
D.
SnapManager for Exchange Single Mailbox Recovery SnapRestore FlexVol FCP or iSCSI