What rule must be followed in order to set the SSIDs correctly in a bin?

A.
No gaps must exist in the SSIDs; that is, all SSIDs in the bin must be sequential
B.
No more then 64 SSIDs are allowed on a DMX-2 ( 5670)
C.
You must always use unique, customer supplied SSIDs when creating a Mainframe bin
D.
You must limit the number of devices to a maximum of 128 per SSID