You are a help desk technician for your company. Stefan and Irene are software developers for the company. Stefan is developing a Web application on his Windows XP Professional computer. The computer is named Stefan132.  All client computers use Microsoft Internet Explorer 6. 0 or later as their Web browser. When Irene types http://Stefan132 in the Address bar of her Web browser, she cannot access the Web application. However, Stefan can access the Web application by typing http://localhost or http://Stefan132 in the Address bar of his Web browser. He can also access resources on the company network. When you run the Ping command on your computer, you cannot connect to Stefan’s computer. When you attempt to access http://Stefan132 from your computer, Internet Explorer displays “DNS or Server Error.” You need to ensure that Irene can access the Web application on Stefan’s computer. First, you establish a Remote Assistance connection to Stefan’s computer. What should you do next on Stefan’s computer?（）

• A、Run the IPconfig /renew command. 
• B、Stop and then restart the World Wide Web Publishing service. 
• C、Ensure that the Everyone group has Allow - Full Control permission on the Inetpub folder. 
• D、In the properties of the Local Area Connection connection, allow a Windows Firewall exception for port 80.