You plan to install Windows XP Professional on a new computer. You have an answer file named unattend.txt and a uniqueness database file named unattend.udb. Unattend.udb contains a section for a computer named Computer1.  You copy the Windows XP Professional source files, unattend.txt, and unattend.udb to a network share named Source. You start the new computer by using a network startup disk, and then map X: to the Source share. You need to start an unattended installation of Windows XP Professional on Computer1. What should you run?（） 

• A、setupmgr.exe /m:computer1
• B、sysprep.exe /t:s:/computer1 
• C、Winnt.exe /unattend:unattend.txt /udf:computer1, unattend.udb /s:x:
• D、Winnt32. exe /unattend:unattend.txt /udf:computer1, unattend.udb /s:x: