Refer to the exhibit. 
A Cisco Wireless IP Phone is unable to seamlessly roam on 2.4 GHz. There are interruptions of
several seconds on each roaming. No problems are reported on 5 GHz. A full site survey for voice
has been completed on both bands.
Which Cisco WLC feature does this issue involve?
A.
client load balancing
B.
Aironet information element
C.
coverage-hole detection
D.
client band select