Which three options help to verify the wireless network operation and locate a possible issue?

A Cisco Aironet 1260 AP is unable to join a Cisco 2500 Series WLC that is connected through a Layer 2 swith.

Which three options help to verify the wireless network operation and locate a possible issue? (Choose three.)
A . Verify status of GUI Wireless > Country
B . Verify status of GUI Wireless > Timers
C . Verify status of GUI WLANs > ID > Advanced
D . CLI debug of dot11
E . CLI debug of DHCP
F . Verify Cisco WLC license
G . Verify Cisco WLC model

Answer: A, E, F