Which of the following, if true, would most undermine part of the author's evidence? A. Some students exposed to maps grasp 3-D and dynamic concepts about the world. B. Most teachers rely very little on the maps displayed in their classrooms. C. Computer generated map displays increasingly in use in classrooms show changes in boundaries almost instantaneously. D. Maps from hundreds of years ago contain errors. E. 2-D maps do not indicate topographical features effectively.