<p>^if you are referring for the purpose of rescinding your admission, then it really depends on college. Yale has mentioned rescinding for a couple of Cs. Other than very high ranks, most would require something significantly worse than that . Ds could be deadly at many and a D in a course required for admission to the college (e.g., if college requires four years of English and last year is D) creates a high risk of rescission because of failure to meet a course requirement if the college requires Cs in all such courses.</p>