A company finished upgrading the wireless encryption to WPA2 Enterprise. The administrator receives a call from a user who is unable to connect to the company wireless. Which of the following is MOST likely causing the connection problem?（）

• A、The laptop is missing the software supplicant
• B、The access point SSID is hidden.
• C、The laptop only supports TKIP and AES encryption,
• D、The access point is on the wrong channel.