Your network contains one Active Directory domain named contoso.com. The domain contains 10 domain
controllers that run Windows Server 2012 R2. Eight domain controllers are writable domain controllers.
You need to deploy several read-only domain controllers (RODCs) in contoso.com by using pre-staged
computer accounts.
Which two tasks should you perform? Each correct answer presents part of the solution.

A.
Join the servers to contoso.com.

B.
Run the Install-AddsDomainControllercmdlet.

C.
Run the Add-AddsReadOnlyDomainControllerAccountcmdlet.

D.
Create an authentication policy silo.

E.
Create an authentication policy.

F.
Run the adprep /rodcprepcommand.

Explanation:
The Add-ADDSReadOnlyDomainControllerAccount cmdlet creates a read-only domain controller (RODC)
account that can be used to install an RODC in Active Directory.
Once you have added the RODC account, you can add an RODC to a server computer by using the InstallADDSDomainController cmdlet with the -ReadOnlyReplica switch parameter.