题目内容：

[单选题]You are the administrator of a Windows 2000 Server network. On each server, you format a separate system partition and a separate boot partition as NTFS.

Several months later, you shut down one of the servers for the maintenance. When you try to restart the server, you receive the following error message "NTLDR is missing. Press any key to restart".

You want to install a new NTLDR file on the server, but you do not want to lose any settings you made since the original installation. What should you do?

A．Start the computer by using the Windows 2000 Server CD-ROM and choose to repair the installation. Select the Recovery Console and copy the NTLDR file on the CD-ROM to the root of the system volume.

B．Start the computer by using the Windows 2000 Server CD-ROM and choose to reinstall. When installation is complete, copy the NTLDR file to the root of the boot volume.

C．Start the computer by using a Windows 2000 bootable floppy disk. From the command prompt, run the sfc/scanboot command.

D．Start the computer by using a Windows 2000 bootable floppy disk. Run the File Signature Verification utility.