Your company has a main office and one branch office. All servers run Windows Server 2003 Service Pack 2 (SP2).In the main office, a server named DNS1 hosts a primary DNS zone for contoso.com.In the branch office, you configure a primary DNS zone for west.contoso.com on a server named DNS2. All servers in the branch office are configured to have the west.contoso.com DNS suffix.You need to ensure that users in the main office can resolve server names in the branch office. You must achieve this goal by using the minimum amount of administrative effort. What should you do?（）
- AOn DNS2, configure a stub zone for contoso.com.
- BOn DNS2, configure a secondary zone for contoso.com.
- COn DNS1, create a primary DNS zone for west.contoso.com.
- DOn DNS1, configure a delegation record for west.contoso.com.