Your network contains a single Active Directory forest. The forest contains two domains
named contoso.com and sales.contoso.com. The domain controllers are configured as
shown in the following table.

All domain controllers run Windows Server 2008 R2. All zones are configured as Active
Directory- integrated zones.
You need to ensure that contoso.com records are available on DC3.
Which command should you run?

A.
dnscmd.exe DC1.contoso.com /ZoneChangeDirectoryPartition contoso.com /domain

B.
dnscmd.exe DC1.contoso.com /ZoneChangeDirectoryPartition contoso.com /forest

C.
dnscmd.exe DC3.contoso.com /ZoneChangeDirectoryPartition contoso.com /domain

D.
dnscmd.exe DC3.contoso.com /ZoneChangeDirectoryPartition contoso.com /forest

Explanation:
http://technet.microsoft.com/en-us/library/cc772069%28v=ws.10%29.aspx#BKMK_23
Dnscmd A command-line interface for managing DNS servers. This utility is useful in
scripting batch files to help automate routine DNS management tasks, or to perform simple
unattended setup and configuration of new DNS servers on your network.
dnscmd /zonechangedirectorypartition
Changes the directory partition on which the specified zone resides.
Syntax
dnscmd [<ServerName>] /zonechangedirectorypartition <ZoneName>]
{[<NewPartitionName>] | [<ZoneType>]
}
Parameters
<ServerName>
Specifies the DNS server to manage, represented by IP address, FQDN, or host name. If
this parameter is omitted, the local server is used.
<ZoneName> The FQDN of the current directory partition on which the zone resides.
<NewPartitionName> The FQDN of the directory partition that the zone will be moved to.
<ZoneType> Specifies the type of directory partition that the zone will be moved to.
/domain Moves the zone to the built-in domain directory partition.
/forest Moves the zone to the built-in forest directory partition.
/legacy Moves the zone to the directory partition that is created for pre–Active Directory
domain controllers. These directory partitions are not necessary for native mode.