单项选择题

A.On Server1, run wsusutil.exe and use the export parameter. On Server2, run wsusutil.exe and use the import parameter. 
B.On Server1, run wsustil.exe and use the movecontent parameter. On Server2, run wsustil.exe and use the movecontent parameter. 
C.On Server1, export the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Update Services\Server\Setup registry key. On Server2, import the registry key. 
D.On Server1, create a backup of the %systemdrive%\WSUS\ folder. On Server2, restore the backup.