you need to take before you can create PSOs?

You work as a Network Administrator at Site.com. Site.com has an Active Directory Domain Services (AD DS) domain named Site.com. The Site.com network has
two domain controllers named Site-SR01 and Site SR02 that have Windows Server 2008 installed.
You add a new Windows Server 2012 R2 domain controller named CertKingdom-SR06 to the network. You now want to use Active Directory Administrative Center
on Site-SR06 to implement Password Settings objects (PSOs). However, you are unable to create a PSO. Which of the following actions do you need to take before
you can create PSOs?

A.
You should seize the operations masters role to Site-SR06.

B.
You should raise the domain functional level.

C.
You should upgrade Site-SR01 and Site-SR02 to at least Windows Server 2008 R2.

D.
You should configure Site-SR06 as a Read-Only domain controller (RODC).