Interpret the meaning of the code %include "readit.sas";
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It will run the readit.sas file
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It will have the reference of the readit.sas file
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It neither have the reference nor run the readit.sas file
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None of the above
The %include directive in SAS executes and inserts the contents of the specified SAS file into the current program. It runs the code in readit.sas as if it were written inline.
In SAS, %include is a macro-language statement that pulls in and executes the SAS source code contained in the named external file (here, readit.sas) as if it were typed directly into the current program at that point. It's not merely a pointer or reference — the code is inserted and processed by the SAS compiler/interpreter, so the practical effect is that the file's statements run. That's why "It will run the readit.sas file" is correct. The other options (only holding a reference, or neither referencing nor running) misdescribe %include's actual behavior, which is textual inclusion followed by execution.