Close Contents Introduction Podcast Beta Questions and Answers More Actions PDF Questions Make a copy Study Flashcards Play Quiz Podcast Beta Play an AI-generated podcast conversation about this lesson 0.7x 0.9x 1x 1.1x 1.3x 1.5x 1.7x 2x Questions and Answers Download PDF PDF Questions PDF Answers What was the main cause of World War 2? The Treaty of Versailles The rise of communism The assassination of Archduke Franz Ferdinand The German invasion of Poland (correct)