You have a computer that runs Windows XP. The computer has one partition. You install Windows 7 on thecomputer. You need to migrate a user profile from the Windows XP installation to Windows 7 installation. What should you do first?（）

A. From Windows 7, run Scanstate.exe /offlineWinOld:c:\windows.
B. From Windows 7, run Scanstate.exe /offlineWinOld:c:\windows.old.
C. At the command prompt, run Xcopy /s /e c:\windows\users\*.* c:\users\.
D. At the command prompt, run Xcopy /s /e c:\windows.old\documents and settings\*.* c:\users\.