By default, which mobility group member controller do the orphaned APs join in the event of a failed controller?

Multiple WLCs are implemented in a high-availability configuration in a mobility group. APs are deployed with only a primary controller assigned.

By default, which mobility group member controller do the orphaned APs join in the event of a failed controller?
A . controller with the most available AP free license capacity
B . controller with the lowest percent of associated APs per license capacity
C . controller with the least CPU utilization over the last reporting period
D . controller with the least number of associated APs

Answer: D

Explanation:

https://mrncciew.com/2013/04/07/ap-failover/