You have a Web server named Web1 that runs Windows Server 2003 Service Pack 2 (SP2). Users on the internal network connect to the Web site on Web1 by using the URLhttp://www.contoso.com.  From the Internet, you cannot connect to the Web site by using the URL http://www.contoso.com. You can connect to the Web site by using the public IP address of Web1.You need to ensure that users on the Internet can connect to the Web site on Web1 by using the URL http://www.contoso.com. You deploy a DNS server that is accessible on the Internet.  What should you do next?（）

• A、Create a stub zone for contoso.com. 
• B、Create a primary zone for contoso.com. 
• C、Create a secondary zone for contoso.com. 
• D、Configure a conditional forwarder for contoso.com.