You add the Hyper-V role to your Windows Server 2008 R2 Datacenter server.  You see the following error in the Windows system event log： Hype-V launch failed： No-execute （NX） or DEP not enabled on processor 0x0 （check BIOS settings）.  You need to be able to start the Hyper-V services. What should you do？（）

• A、Remove and re-add the Hyper-V role.
• B、Restart the Hyper-V Virtual Machine Management service.
• C、Enable the Intel XD bit （exclude disable bit） or AMD NX bit （no execute bit）.
• D、Enable the Intel Virtualization Technology （Intel VT） or AMD Virtualization （AMD-V）.