Your network contains an Active Directory forestnamed contoso.com.
The forest contains a single domainand 10 domain controllers.
All of the domain controllersrun Windows Server 2008 R2 Service Pack 1(SP1).
The forest containsan application directory partitionnamed dc=app1, dc=contoso,dc=com.
A domain controllernamed DC1has a copy of the application directory partition.
You need to configure a domain controller named DC2 to receive a copy of dc=app1, dc=contoso,
dc=corn.
Which toolshould you use?

A.
Active Directory Sites and Services

B.
Dsmod

C.
Dcpromo

D.
Dsmgmt

Explanation:
Reference:
http://technet.microsoft.com/en-us/library/cc732887.aspx
Dcpromo
Installs and removes Active Directory Domain Services (AD DS).
Parameter
ApplicationPartitionsToReplicate:””
Specifies the application directory partitions thatdcpromo will replicate. Use the following format:
“partition1” “partition2” “partitionN”
Use * to replicate all application directory partitions.