You need to prepopulate the password for User1 on DC2

Your network contains an Active Directory domain named adatum.com. The domain
contains two domain controllers that run Windows Server 2012 R2. The domain controllers
are configured as shown in the following table.

You log on to DC1 by using a user account that is a member of the Domain Admins group,
and then you create a new user account named User1.
You need to prepopulate the password for User1 on DC2.
What should you do first?

A.
Connect to DC2 from Active Directory Users and Computers.

B.
Add DC2 to the Allowed RODC Password Replication Policy group.

C.
Add the User1 account to the Allowed RODC Password Replication Policy group.

D.
Run Active Directory Users and Computers as a member of the Enterprise Admins group.

Explanation:
http://technet.microsoft.com/en-us/library/cc730883(v=ws.10).aspx
http://technet.microsoft.com/en-us/library/cc753470(v=ws.10).aspx#BKMK_pre