A、north and south. B、east and west. C、south and west. D、north and east. A此题考查听细节的能力。注意抓住关键词division，“分歧”的意思。在北方和南方的分歧中，导致了美国的内战

The Revolution resulting in America was the most significant event in American history. This country would not be here without it. The Revolution led to the making of the American Constitution. The constitution set up a basis upon which the most powerful nation in the world would grow.
    The Civil War is also one of the most influential events that helped to shape the United States. The division of the industrial North and slave-owning South resulted in the Civil War. If the South had won, the entire nation right now would be completely different. Half of our population would not have its freedom. No black person would ever have a high position in the government, such as mayor. Every single person’s life would be completely different had the Civil War never occurred.
    Time Magazine listed the one hundred most important events in American History. They included going to the moon, Watergate, World War Two, AIDS, the Industrial Revolution, and so on. However, at the very top of their list as number one was the atomic bomb. Some people agree with this, others disagree. Some say that the bombing of Hiroshima was the most influential event in American History. Having this military power established the United States as the leading world country. Hiroshima ended World War Two and appointed America as the most powerful country on the entire earth; however, it leads to severe Problems in the future. If there ever is a World War Three, no living thing on this earth would survive. As for now, some people believe that America is the leading country because of its advantage at the end of World War Two.