PART A: Which TWO of the following best identify the central ideas of this article? Many people and groups contributed to the development and refinement of mass-producible Liberty ships, highly formidable B-29s, and the atomic bomb. B. Throughout World War II, more Americans were killed or wounded while working in industrial settings in the United States than in combat. С. Despite being in a relatively lacking condition before the United States entered World War II, American industry developed and progressed considerably thereafter. D. The widespread adoption of the assembly line system allowed industrial productivity to skyrocket within the United States. E. The creation and use of the atomic bomb was the most significant event of the Second World War. F. The United States' improvements upon Liberty ships were the nation's most important contribution to the war effort in Britain. ​