Retaking C's for my core classes?

I know there's lot of thread regarding retaking C's and how is it not beneficial to retake these core classes, but how about for person who have very low GPA? I have these core classes that I took 10 years ago and I did not do well. These courses I have taken back in 2008-2009 at community college: Gen Chem 1: C Gen Chem 2: C Calculus: C General Bio: C General Bio II: D Physics 1-3: All C's Genetics: D Recently at university: Organic Chemistry 1: B Organic Chemistry... Retaking C's for my core classes?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums