<p>i suggest doing the AB, cuz while A is about the actual programming such as syntax, logic, loops, recursions, etc, the AB focuses on data structures, which i actually found to be easier than the programming part for test taking. For the programming part of the test, they give you a bunch of repetitive loops and recursions and ask you what the result is, busy work and really screws around with your head (personally speaking). On the other hand, the data structures part is actually more logically-inclined and I find it easier.
Also, next year is going to be the final year there IS GOING TO BE a computer science AB test, they are taking the AB out because so little people take it. So if you are thinking of taking the AB later… not going to happen.</p>