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.
many functions do not have to be implemented twice.
All of these
None of these

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Operating System (OS)
Assembler language

is usually the primary user interface
None of these
is a mnemonic form of machine language
requires fixed-format commands
is quite different from the SCL interpreter

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