PART A: Which of the following best identifies the central idea of this article? A Lewis and Clark set out on their journey with hopes of becoming famous. B Lewis and Clark made an important trip west to help create one of the earliest maps of the United States. C The only goal of Lewis and Clark’s journey was to discover the location of the Missouri River and where the river ended. D Before they began their journey, Lewis and Clark used maps of the western United States to decide the best route to take.