I know that ur not suppoesd to take prereqs at cc...they will know that it is a C- , I dont know where u got that information but my grades are listed exactly as they were on my AADSAS. I suppose whether or not id suggest retaking it depends on ur dat and gpa.. if its >3.5 and 20s, i would let it slide, do very well in the 2nd sem, and have an explanation for why u did poorly in the first.
IMO while it is an important prereq, it is not at par with chem, bio, etc. in importance seeing as how it is not on the DAT.