You plan to deploy three Hyper-V servers named Server1 Server2， and Server3. Server1 will host three virtual machines （VMs）， Server2 will host two VMs， and Server3 will host five VMs. All of the VMs will run Windows Server 2008 R2 Standard. You need to identify the minimum number and the type of licenses required for the planned deployment. The solution must minimize software costs. What should you identify？（）

A. Three Windows Server 2008 R2 Enterprise licenses and one Windows Server 2008 R2 Standard license
B. Three Windows Server 2008 R2 Enterprise licenses
C. Three Windows Server 2008 R2 Standard licenses
D. Three Windows Server 2008 R2 Enterprise licenses and 10 Windows Server 2008 R2 Standard license