Transfer Admission

So this semester I was accepted through onsite admissions to JMU from a community college. All I had to do was get an A or B in my ASL class and my microbiology class by midterms. I achieved both and was accepted. In the acceptance letter it said acceptance is contingent on earning grades C or higher in my courses. I have As in all my classes but I worried I may get a D in micro… long story short I’m freaking out, I need to get in this semester. Will they rescind my acceptance??? If I go in and talk to admissions could we work something out?