Final answer:
The correct command line entry to start an archive or restore a process on a Windows XP computer is 'C. NTBACKUP'. It enables backup and restores functionalities that can be initiated via the Command Prompt by typing 'ntbackup'. Therefore, the correct option is C.
Step-by-step explanation:
The command line entry to start an archive or restore a process on a Windows XP computer is C. NTBACKUP. This utility allows you to perform various backup operations, including creating backups of your files, restoring files from a backup, and managing the backup media itself. NTBACKUP was included with the operating system and could be started either from the command line or through the graphical user interface.
To start NTBACKUP from the command line, you simply need to open the Command Prompt and type ntbackup. This would open the Backup or Restore Wizard unless specific command-line parameters were added to tailor the operation to your specific needs.
Therefore, the correct option is C.