You need to ensure that you can use IPAM to manage the DHCP and DNS settings in both domains

Your network contains an Active Directory forest that has two domains named contoso.com and
europe.contoso.com. The forest contains five servers. The servers are configured as shown in the
following table.

You plan to manage the DHCP settings and the DNS settings centrally by using IP Address Management
(IPAM).
You need to ensure that you can use IPAM to manage the DHCP and DNS settings in both domains. The
solution must use the minimum amount of administrative effort.
What should you do?

A.
Upgrade DCE1 and DCE2 to Windows Server 2012, and then install the IP Address
Management (IPAM) Server feature. Run the Set-IpamConfiguration cmdlet for each domain.

B.
Upgrade DCE1 and DCE2 to Windows Server 2012, and then install the IP Address
Management (IPAM) Server feature. Run the Invoke-IpamGpoProvisioning cmdlet for each domain.

C.
Upgrade DC1 and DC2 to Windows Server 2012, and then install the IP Address
Management (IPAM) Server feature. Run the Invoke-IpamGpoProvisioning cmdlet for each domain.

D.
Upgrade DC1 and DC2 to Windows Server 2012, and then install the IP Address
Management (IPAM) Server feature. Run the Set-IpamConfiguration cmdlet for each domain.

Explanation:
* You can use IPAM to manage DHCP servers running on Windows Server 2008 R2 and above. Here DCE1
and DCE2 are running Windows 2003, so they need to be upgraded to Windows Server 2008 R2 or
above.
* Invoke-IpamGpoProvisioning
Creates and links group policies in the specified domain for provisioning required access settings on the
servers managed by the computer running the IP Address Management (IPAM) server.
Incorrect:Not C: DC1 and DC2 do not need to be upgraded as IPAM can manage DHCP servers running on Windows
Server 2008 R2 and above.
Not A, Not D: Set-IpamConfiguration
Sets the configuration for the computer running the IP Address Management (IPAM) server, including the
TCP port number over which the computer running the IPAM Remote Server Administration Tools (RSAT)
client connects with the computer running the IPAM server.
IPAM managed DHCP server requirements
http://windowsitpro.com/windows-server-2003-end-support/ipam-managed-dhcp-server-requirements
Upgrade the Windows 2003 Servers.