about 4 years ago, i took my pre-req classes and came out with a pretty big handful of C's. I've graduated and am planning on going back to school to rack up on A's in upper division sciences at the university to "redeem" myself. my question is, should i retake the courses i've received C's in? I feel more confident to do a lot better this time but I dont know if it would be a waste of time. Should I rather take more upper div science classes and get A's in those or is retaking worth it? thanks!