Answer:
Explanation: Text features(like titles, captions, bullets, bold/italics, etc.) play a vital role in arranging the various information in the text effectively which assists the readers to understand it clearly and comprehensively. In the given excerpt from 'How to prepare for a Road Trip', the author opts a hierarchical structure to present information clearly to the readers which is reflected through the use of two different sizes of bullet points. The first size of bullet is employed to detail the reader about the preparation of a car while planning a road trip('tune-up, change of oil, good condition of tires, having a spare tire, availing an emergency kit, etc.). The second size of bullets explains the readers about the items that must be included in an emergency car kit. Thus, this sequential arrangement of information helps the readers to understand it extensively. Therefore, option A is the correct answer.