What did it do to your GPA? What did the lab portion do to your final grade in that class? Obviously once you start college, prior to getting accepted to an academy, grades become more important. I don't believe; but I could be wrong; that they offer the prep school to someone with a semester or more of college credit. Although; college credits don't count towards the academy. I.e. You still have to do 4 years, even if you have a B.S. in Chemistry. So, if the prep school isn't an option, grades become more important when applying.
But remember 2 things. 1) You can't get accepted to the academy if you don't apply 100% all the way through. 2) Acceptance is based on the "Whole Person" concept. There's different categories that you are rated on, with academics being only 1 category. Yes, it's probably the most weighted, but it's not the only one. If the "B" in lecture and "D" in lab gave you a "C" overall in the class; and you have "A" and "B" in the other classes; if the final score was say 3 "As" 1 "B" and 1 "C", then that would give you a 3.4 gpa. That is workable. There's a lot of factors to consider. Good luck. later... mike...