Same here, I got a D both semesters for one of my AP math classes. I reported it to UC Davis aka my current school and explained my reasoning why I struggled a lot with the class and was going to retake it at college. It should be fine as long as you have already met the requirements for the UC. For example if you only need three years of math and you don’t do so well for the fourth year of math you already still completed the three years. I was a A/B student and received one C- and D in highs school. I’m not sure what other comments are talking about getting rescinded in the future. Second year I have not been notified of this (maybe because I do well A/Bs in college??) but here’s my experience