Which of the following would need to be done first?

Topic 1, Leyburn Investments
Company Background
Leyburn Investments is a global financial services company. The company has 5,100 employees
based in offices in New York, London, Rome and Madrid.
The New York office is the corporate headquarters. The New York office has 3000 employees.
The London, Rome and Madrid offices each have 700 employees.
Existing Environment
Existing Active Directory Environment
The network consists of a single Active Directory forest named LeyburnInv.com. The New York
office contains the LeyburnInv.com root domain. The London, Rome and Madrid offices have
domains named London.LeyburnInv.com, Rome.LeyburnInv.com and Madrid.LeyburnInv.com
respectively.
All four domains have domain controllers running Windows Server 2008 R2. All domain controllers
are configured as DNS Servers. The forest functional level of the LeyburnInv.com forest is
Windows Server 2008.
Network Infrastructure
Each of the four offices has a high speed Internet connection. All four offices have VPN
connections to the other offices.
Each office includes the following servers:
Two physical Windows Server 2008 R2 domain controllers.
One physical Windows Server 2008 R2 DHCP server.
Four physical Windows Server 2008 R2 file servers.
Business Requirements
Planned Changes
The Rome and Madrid offices will be closed.
Active Directory user accounts, computer accounts and Group Policy Objects (GPOs) from the
Rome.LeyburnInv.com domain will be moved to the London.LeyburnInv.com domain and the
Rome.LeyburnInv.com domain will be decommissioned.

The Madrid office will be moved to Barcelona. The Madrid.LeyburnInv.com domain will be
renamed to Barcelona.LeyburnInv.com.
A Windows Server IP Address Management (IPAM) server will be deployed in each office.
Ten new Windows Server 2012 Hyper-V host servers will be deployed to the New York, London
and Barcelona offices.
Active Directory Recycle Bin will be enabled in each domain.
Start Menu and Desktop folder redirection will be enabled in the Barcelona office.
Technical Requirements
Leyburn Investments has the following technical requirements:
Allow for software installation using disk imaging or virtual machine cloning
Reduce the number of physical servers by using virtualization.
Upgrade servers to Windows Server 2012.
Implement a central solution for managing virtual machines.
Deploy virtual domain controllers using virtual machine cloning.
Distribute virtual machines between Hyper-V hosts automatically according to server load.
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You need to enable Active Directory Recycle Bin in the domains.

Which of the following would need to be done first?

A.
The functional level of the forest needs to be raised to Windows Server 2008 R2 or later.

B.
The domain controller running the Schema Master role needs to be upgraded to Windows
Server 2012.

C.
All domain controllers need to be upgraded to Windows Server 2012.

D.
All domain controllers running the Infrastructure Master role need to be upgraded to Windows
Server 2012.