Your company has a main office and one branch office. The network consists of an Active Directory domain named contoso.com. All servers run Windows Server 2003 Service Pack 2 (SP2). In the main office, a server named DNS1 hosts the primary DNS zone for contoso.com. In the branch office, you configure a secondary DNS zone for contoso.com on a server named DNS2. You discover that the resource records are not being transferred to DNS2.You verify that the contoso.com zone on DNS2 is configured to have the correct IP address for DNS1. You need to ensure that the resource records for contoso.com are transferred to DNS2. What should you do?（）

• A、On DNS2, configure a stub zone for contoso.com. 
• B、On DNS2, configure a conditional forwarder for contoso.com. 
• C、On DNS1, configure a delegation record for DNS2.contoso.com. 
• D、On DNS1, add the IP address for DNS2 to the contoso.com Name Servers list.