If you need to know it, it's in this book. Cracking the AP World History, 2012 Edition, includes:
 
   * 2 full-length practice tests, fully updated for the May 2012 Exam
   * Comprehensive review of all topics from prehistoric times to the present
   * Timelines, summaries, and key term lists in every chapter
   * Helpful strategies for writing high-scoring DBQ and free-response essays
   * Advice on how to use Process of Elimination to maximize your multiple-choice section score
   * Updated strategies which reflect the AP test scoring change
   * Detailed explanations for every practice question