Problem: Karl Marxs most important book on communism, Das Kapital will be available on Bernie Sanders website next week. Group of answer choices a) Karl Marxs most important book on communism, Das Kapital, will be available on Bernie Sanders's website next week. b) Karl Marxs most important book on communism, Das Kapital, will be available on Bernie Sanders website next week. c) Karl Marx's most important book on communism, Das Kapital, will be available on Bernie Sanders' website next week. d) Karl Marx's most important book on communism, Das Kapital will be available on Bernie Sander's website next week.