I’m just curious
I’ve never heard of this happening. I think it would be a safe assumption that if you 1) did not complete the basic academic curriculum requirements stated on the admissions website, 2) you received nothing but Ds and Fs your final high school semester, or 3) if you are convicted of a significant criminal act, there would be grounds to rescind your offer of admission. Once again, I’ve never heard of this happening - I wouldn’t think one C during your final high school semester would ruin you. That said, merit aid could be withdrawn if your grades are absolutely terrible your final high school semester - but I would hope you would have a conversation with admissions to discuss the reasons for your drop in performance - or better yet to discuss with them in advance if you feel there are legitimate reasons (a serious illness, for example).