<p>since you are aiming for top 20 schools, i would say you should be getting at least 4 As and maybe one B. No C period. Of course one bad grade can’t completed rule out your chances.
in Sophomore and Junior year, my son received straight As. His course loads was very similar to yours (sub AP Physics with AP Chem)There is no guarantee he will get in to any top 20 school. We will find out in April.</p>