You are the desktop administrator for your company's sales department. Katrin is a user in the sales department. You need to upgrade Katrin's Windows 2000 Professional computer to Windows XP Professional. Philippe is the network administrator. He previously downloaded updated Setup files and placed them on a server named Server1, in a shared folder named Updates. Philippe has successfully installed computers by using these updated Setup files. You want to ensure that these updated Setup files are automatically installed on Katrin's computer during the upgrade. Which command should you run to start Setup?（）

A. Winnt32. exe /dushare:\\server1\updates
B. Winnt32. exe /copydir:\\server1\updates
C. Winnt32. exe /duprepare:\\server1\updates
D. Winnt32. exe /copysource:\\server1\update