I took that class a very long time ago over a decade ago. Even if I did remember, I wouldn’t tell you because I remember something about discussing exam content being prohibited. Your best bet is to go to the College Board’s website and look at released exams and decide for yourself how important Pre-Columbian Societies. Below is the College Board website which lists the free response questions from previous years.
http://apcentral.collegeboard.com/apc/members/exam/exam_information/216943.html