Wireless users report frequent disconnections from the wireless network. While troubleshooting, a network engineer finds that after the user is disconnected, the connection re-establishes automatically without any input required. The engineer also notices these message logs:
AP 'AP2' is down. Reason: Radio channel set. 6:54:04 PM
AP 'AP4' is down. Reason: Radio channel set. 6:44:49 PM
AP 'AP7' is down. Reason: Radio channel set. 6:34:32 PM
Which action reduces the user impact?

A.	enable coverage hole detection
B.	increase the AP heartbeat timeout
C.	enable BandSelect
D.	increase the dynamic channel assignment interval