Operating System (OS)
The advantage of a command processor running only built-in commands is:

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

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Operating System (OS)
The advantage(s) of incorporating the macro processor into pass 1 is(are):

Functions are combined and it is not necessary to create intermediate files as output from the macros processor and input to the assembler.
more flexibility is available to the programmer in that he may use all the features of the assembler in conjunction with macros.
All of these
None of these
many functions do not have to be implemented twice.

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