I have been admitted to UCD as a transfer student for fall quarter but am subject to cancellation of admissions because I received a C grade in a biology course in the spring semester. The minimum grade requirement for that course is a B. That is the only C I have received at a community college. The rest of my grades during that semester are either an A or B. I took a total of two biology courses concurrently and a trigonometry course that spring semester. What is the best thing to do now? How likely is it that my admissions would be cancelled? UCD asked for a letter for any explanations, what should I include in it?