Your company has a single Active Directory domain. AlI domain controllers run Windows Server 2003 You install Windows Server 2008 on a server. You need to add the new server as a domaincontroller in your domain.What should you do first（）

• A、On the new server， run dcpromo /adv.
• B、On the new server， run dcpromo /createdcaccount.
• C、On a domain controller run adprep /rodcprep.
• D、On a domain controller， run adprep /forestprep.