A.Create a stub zone for partner.com on each DNS server in contoso.com.
B.Configure the Zone Replication Scope for partner.com to replicate to all DNS servers in the forest.
C.Configure an application directory partition in the contoso.com forest. Enlist all DNS servers in the contoso.com forest in the partition.
D.Configure an application directory partition in the partner forest. Enlist all DNS servers in the partner forest in the partition.