If I have received an appointment on my second try, is there a certain grade in college classes that will possibly get my appointment rescinded? I'm doing fine in the STEM classes( chem, physics, calc 1/2) but at my school, the engineering curriculum requires an economics class, and that is causing problems. Is a C going to get the appointment rescinded? If below, would withdrawing from the class (no grade penalty/grade isn't on transcript, but transcript does show drop) look worse?