What is an important consideration when implementing a dual SSID design for BYOD?

What is an important consideration when implementing a dual SSID design for BYOD?
A . After using the provisioning SSID, an ACL that used to make the client switch SSIDs forces the user to associate and traverse the network by MAC filtering.
B . If multiple WLCs are used, the WLAN IDs must be exact for the clients to be provisioned and traverse the network correctly.
C . SSIDs for this setup must be configured with NAC State-RADIUS NAC for the clients to authenticate with Cisco ISE, or with NAC State-ISE NAC for Cisco ISE to associate the client.
D . One SSID is for provisioning and the other SSID is for gaining access to the network.
The use of an ACL should not be enforced to make the client connect to the REAL SSID after provisioning.

Answer: B