You are the administrator of an Active Directory domain. All servers run Windows Server 2003.  You configure a server named Server3 as the DNS server for the domain.The company recently started using a new ISP. Since the change to the new ISP occurred， users report that they cannot access Internet Web sites by using their fully qualified domain names （FQDNs）.You manually configure a test computer to use the DNS server address of the new ISP. The test computer can successfully access Internet Web sites by using their FQDNs.You need to ensure that network users can access Internet Web sites by using their FQDNs， while ensuring that user access to internal resources is not disrupted.   What are two possible ways to achieve this goal？（）

• A、Create a root zone on Server3.
• B、Configure Server3 to use the default root hints.
• C、Configure a forwarder on Server3 to the new ISP’s DNS server.
• D、Configure all computers on your network to use the new ISP’s DNS server.