The AOs aren't stupid. (Just kidding. Of course they are.)
They know it's a C or a D. It looks bad either way.
But it's an elective class, so it's not part of recalculated "core" GPA.
https://www.collegevine.com/faq/24361/incomplete-vs-withdrawal-on-transcript
What's the student's overall GPA? Whar tier of selective college are they hoping for?
What grade is the student in? Best bet is to try again next year and get a better grade.