Which three actions should you perform?

Your network contains an Active Directory domain named contoso.com.
The domain contains five domain controllers.
You have a branch office that has a local support technician named Tech1.
Tech1 installs Windows Server 2016 on a server named RODC1 in a workgroup.
You need Tech1 to deploy RODC1 as a read-only domain controller (RODC) in the contoso.com domain.
Which three actions should you perform? Each correct answer presents part of the solution.

A.
Instruct Tech1 to run the Active Directory Domain Services Configuration Wizard.

B.
Create an RODC computer account by using Active Administrative Center.

C.
Instruct Tech1 to run dcpromo.exe on RODC1.

D.
Instruct Tech1 to install the Active Directory Domain Services server role on RODC1.

E.
Modify the permissions of the Domain Controllers organizational unit (OU).