You are configuring WLC high availability for an access point. Which statement is true?

A.
You always need to configure both the controller system names and WLC IP address.

B.
High availability can only be configured using the WLC IP addresses.

C.
Controller names in access point high availability configurations are not case-sensitive.

D.
A WLC IP address only needs to be configured when the backup WLC is in a different mobility
group.