A company has servers that run a Server Core installation of Windows Server 2008. You are designing the migration of the servers to Windows Server 2008 R2. After the migration, you will install the Remote Desktop Services server role and the Print and Document Services server role on the servers. You need to ensure that shared resources on the servers are available after the migration, and minimize administrative effort. What should you recommend? (More than one answer choice may achieve the goal. Select the BEST answer.)
A. Deploy new servers with a Server Core installation of Windows Server 2008 R2. Migrate the shared resources to the new servers.
B. Upgrade the existing servers to a Server Core installation of Windows Server 2008 R2, and then upgrade the servers to a full installation of Windows Server 2008 R2.
C. Move the shared resources off of the existing servers. Perform a clean installation of Windows Server 2008 R2 on the servers. Move the shared resources back onto the servers.
D. Deploy new servers with Windows Server 2008 R2 installed. Migrate the shared resources to the new servers.