Which configuration is the cause of this issue?

A company has 10 access point licenses available on their backup Cisco WLC and their primary Cisco WLC is at full capacity, 5 access points are set to high failover priority and 7 access points are set to critical failover priority. During a failure, not all critical access points failed over to the backup Cisco WLC .

Which configuration is the cause of this issue?
A . The high priority access point is oversubscribed.
B . network ap-priority is set to enable.
C . The critical priority access point count is oversubscribed.
D . network ap-priority is set to disable.

Answer: A

Explanation:

https://www.ciscolive.com/c/dam/r/ciscolive/emea/docs/2016/pdf/BRKCOL-2275.pdf