<p>what's the difference? can i just take bc instead of ab since bc gives a ab subscore or do i have to take both?</p>
<p>AB covers less material than BC. Take BC if you're taking the class, otherwise take AB.</p>
<p>If you take BC, even though you get an AB subscore, you can't get credit for AB. In other words, if a college requires a 4 or 5 on BC OR a 5 on AB to gain credit for the same course, a 3 on the BC exam with a 5 AB subscore will NOT get you any credit.</p>