Which sentence most accurately explains what's happening with the text features in this excerpt? a. the author uses two kinds of bullet points for two different topics: race running and road trip preparation. b. the author sets up a hierarchical structure of information using two sizes of bullet points. c. the author fails to use text features adequately, so the large blocks of text become monotonous and confusing. d. the author does not distinguish between the points about vehicle preparation and the items of an emergency kit.