Which is the maximum number of active zone sets on Cisco MDS 9500 Series Fibre Channel Switches?

Which is the maximum number of active zone sets on Cisco MDS 9500 Series Fibre Channel
Switches?

A.
1 with all licenses

B.
2 with Standard Zoning license

C.
3 with Enhanced Zoning license

D.
4 with Enterprise Zoning license