Our S19 got a 5 on BC Calc as a junior and is taking MV at his high school right now. We aren’t sure yet what he will do and will discuss with his college’s math dept once he decides where to go. He’s thinking of being a math or physics major so doesn’t want to skip too far but also may not need to repeat. One school already told him that he should just move on to linear algebra but I’m leaning towards having him ask to see tests from the classes he could pass out of and see what he thinks. If he feels solid on the material, then he’ll move on. If not, he will retake MV. I really think it’s the only way to decide unless you can find someone from your high school going to the same college who took BC and got the same grade in the class and score on the test. Then, get that student’s perspective.