<p>a school can take away your acceptance if your grades are too low or for any other reason that shows that you arent doing well or are in trouble (suspensions, etc). maybe they wouldnt if it was just ONE class, but it depends on your overall record. they dont want your upward trend in grades going that far down; c- and d+ is really pushing it. low bs or bs would be the lowest you can go to be safe, but then again thats risky if you usually get as and a couple bs because it shows youre slacking–especially if the other 3 years you were able to get usually as and a couple bs</p>