I recently got my prelim marks back for both chem and bio. I was set on dropping bio however I did somewhat well (81%), whilst doing really badly in chem (69%, below average). Is a chem comeback possible? or should I cut my losses? I am picking up two extension units so I will have 13 units if I drop one, however I can also drop both, having 11 units. I am a bit worried about 11 units though as I feel I won't perform as well in some, and don't want them to count.