Refer to the exhibit.  How will interface FastEthernnet0/1 respond when an 802.1x-enabled client  connects to the port？  （）

• A、 The switch will uniquely authorize the client by using the client MAC address.
• B、 The switch will cause the port to remain in the unauthorized state， ignoring all attempts by the  client to authenticate.
• C、 The switch port will disable 802.1x port-based authentication and cause the port to transition to  the authorized state without any further authentication exchange.
• D、 The switch port will enable 802.1x port-based authentication and begin relaying authentication  messages between the client and the authentication server.