You work as the IT professional in an international company which is named Wiikigo. You are experiencedin implementing and administering a network operating system. You are specialized in deploying servers，configuring Windows Server 2008 Terminal services and network application services， and configuring aweb services infrastructure. There is a server， and Windows Server 2008 is run by the server. The Hyper-Vserver role is installed on the server and one virtual machine is contained by the server. Windows Server2008 is run by the virtual machine. You decide to have a new application installed on the virtual machine.You are required to make sure that the virtual machine can be restored to its original state in the event theapplication installation fails. Which action should be performed to achieve the goal？（）

• A、To achieve the goal， a snapshot should be created from Hyper-V Manager console.
• B、To achieve the goal， the state of the virtual machine should be saved from Hyper-V Manager console.
• C、To achieve the goal， Log on to the virtual host and enable the Remote Differential Compression feature.
• D、To achieve the goal， the virtual host should be logged on to and the Windows Server Backup featureshould be enabled.