If your son is similar to mine and would rather take a B then make waves (or talk to the teacher about one point that he thinks he got right that would move his grade to a 90, lol), then it might make sense to just stick with AB. It doesn’t sound as though his main interest is math/eng and if the guidance counselor will mark the schedule as most rigorous, he will have AP courses in his area of interest and a better chance of a strong GPA. I tried to tell my son to see what the other kids were taking, and he turned it around on me and said, “I thought I wasn’t supposed to follow what every else did if it wasn’t right for me”…have your son do what’s right for him, it will all work out!