You deploy a Windows Server 2008 R2 Hyper-V server with one virtual machine （VM）. The host  servers CPU resources are fully utilized by the VM. You need to ensure that the VM does not fully utilize the host servers CPU resources. What should you do？（）

• A、Set the relative weight to 80.
• B、Set the virtual machine limit to 80.
• C、Set the virtual machine reserve to 80.
• D、Set the number of logical processors to 2.