I suspect that you are going through either certification training materials or some other training. But you should at least have a specific question of your own abou the posed question.
Maybe something like: I thought the result would be X because of "some idea" but the result is Y? Why is it not Y?
The "answer" will be in the data set.
Run the code, examine the log and then proc print data=work.retail; run;
Note: Posting such things into the body of the forum may reformat code so that what is seen in your post is not the actual code you started with. Post code into a code box opened with the {i} icon in the forum message menu bar.
See if anything from my response to https://communities.sas.com/t5/Base-SAS-Programming/value-of-variable/m-p/341363 looks familiar here.
Is it really easier to post a question here, than to paste the code into the Program Editor and run it?
Assuming you posted the code correctly, the answer is "D". There is a missing semicolon just before the RUN; statement, so you get a syntax error.
It's worth learning what happens if you were to add the semicolon. Try testing it that way.
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