YouhaveanetbookcomputerthatrunsWindows7.Thecomputerhasasingle30-GBpartitionthathas10GBoffreespace.YouneedtocreateasystemimageofthecomputerbyusingWindowsBackup.Youmustachievethisgoalbyusingtheminimumamountoftime.Whatshouldyoudofirst?（）
A.Attachanexternalharddisk.
B.AttachanexternalDVDburner.
C.ConvertthelocalharddisktoaGPTdisk.
D.Createandattachavirtualharddrive（VHD）.
参考答案：A
