The advantage of a command processor running only built-in commands is:

• A. flexibility to the users in running lists of commands by simply collecting them in named batch command files
• B. the processing is much faster than would other-wise be the case when user defined commands are used
• C. None of these
• D. the command set being common across different hardware configurations
• E. users can create system programs and run them as commands

Answer: (D)