Voltaire believed above all in the efficacy of reason. He believed social progress could be achieved through reason and that no authority—religious or political or otherwise—should be immune to challenge by reason. He emphasized in his work the importance of tolerance, especially religious tolerance. The first answer should be b
Three days after the Hiroshima bombing, President Truman speaks to the nation in a radio address: The world will note that the first atomic bomb was dropped on Hiroshima, a military base. By this time, the United States had already dropped its second bomb on Nagasaki. This answer would be b as well