@ucbalumnus it says that 16A credit will be dropped after I take 1A. 
However, it says on 16B that 1A will be dropped if I take that. Would you recommend taking that instead? And do you know how that would look on my transcript given that I P/NP 1A? I got a 4 on AP Calculus, I got average or more than average for the Math 1A quizzes. The midterm is the one that just threw me off even with a curve. I think I can study harder to get a better grade for 16B, if that will be the case.