Under which three conditions does a client initiate roaming between wireless cells in the Company WLAN？ （）
- A The access point has broadcast too many SSIDs.
- B The wireless client has missed too many beacons from the access point.
- C The maximum data retry count， initiated by the wireless client， is exceeded.
- D The wireless client has reduced the data rate.
- E The access point has requested client reauthentication.
- F The wireless client has missed too many IAPP （Inter Access Point Protocol） updates.