In an English class, what does c/s stand for?

I turned a paper in to my Englsih 1010 class and had it returned with "c/s" next to one of my sentences. What does that mean?

In an English class, what does c/s stand for?
What was the sentence where c/s appeared?





Edit:


Following the bulleted points is a crucial peice of logos that strongly supports K%26amp;N Engineering, a dynamometer graph before and after the K%26amp;N intake system was installed on the 2007 Charger.





It could be comma splice. The easiest fix would be to put a semi-colon where you currently have a comma.





peice should be spelled piece
Reply:ask your teacher... he/she probably has a special key for abbreviations.
Reply:c/s in standard English classes means that you have used a comma splice in the sentence in question.
Reply:corrections/spelling ? I dunno