Refer to the exhibit.  What will happen when one more user is connected to interface FastEthernet 5/1？ （）

• A、All secure addresses will age out and be removed from the secure address list. This will cause the security violation counter to increment.
• B、The first address learned on the port will be removed from the secure address list and be replaced with the new address.
• C、The interface will be placed into the error-disabled state immediately， and an SNMP trap notification will be sent.
• D、The packets with the new source addresses will be dropped until a sufficient number of secure MAC addresses are removed from the secure address list.