What is the main huge differences between MERCOSUR and NAFTA the Professor pointed out? Select one: a. MERCOSUR is working towards total elimination of all tariffs; NAFTA definitely not. b. MERCOSUR is working towards full political integration at the sovereign level; NAFTA definitely not. c. MERCOSUR is working towards free movement of people; NAFTA definitely not. d. MERCOSUR has created a singular judicial system for all member states; NAFTA definitely not. e. Actually, all the above are true