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.