What was the condition of your transfer?? Did your GPA go down a lot?? If this your only C and you total GPA is still good. I wouldn't worry that much. You might want to call the school and ask them if this one grade can impact their decision to admit you, I don't think so unless it killed your GPA. But even still ranking is more important than GPA so did it hurt your ranking a lot?? I would call the school, but I would say unless you bombed your classes, you should be ok. That is what a conditional acceptance is, saying they like what they see of you so far, and want to accept you, but still have to wait and see that you didnt' fail second semester. Good luck!