单项选择题

Windows XP mode on a Windows 7 Professional machine fails to load. Which of the following isMOST likely the cause?()

A. The machine does not have enough processor cores to allow for this feature.
B. Virtualization support is not enabled in the BIOS.
C. A license of Windows XP must be purchased in order to use Windows XP Mode.
D. The machine does not have enough RAM to allow for this feature.