What is an accurate statement about Zoning?

What is an accurate statement about Zoning?
A . FC switch ports, FC HBA ports, and storage ports should not be members of multiple zones
B . Nodes that are distributed across multiple switches in a switched fabric may also be grouped into the same zone
C . Increases the amount of fabric-management traffic within a zone by sending RSCNs to all nodes in a fabric
D . Multiple zone sets may be defined in a fabric and all zone sets must be active at a time

Answer: B