You work as an administrator at ABC.com. The ABC.com network consists of a single domain named ABC.com. All servers in the ABC.com domain， including domain controllers， have Windows Server 2012 R2 installed.You have been instructed to add a new domain controller to ABC.com’s existing environment. Which of the following actions should you take？（）
- AYou should consider making use of Server Manager.
- BYou should consider making use of Authorization Manager.
- CYou should consider making use of Remote Desktop Gateway Manager.
- DYou should consider making use of Network Load Balancing Manager.