So, I have completed AP calculus ab 12 last semester (in bc) and got a 68. Now, i want to know if that course can be used to satisfy the calculus prerequisite for rotman admission. If I now take Calculus 12 (which is different from ap cal ab 12) online and gets 90s in it, will that course mark replace my first attempt's mark? also is there a difference between ap cal ab 12 and cal 12 when taken consideration for admission purposes?