At the revision point, the writer must choose a detail that makes the following actions logical and easy to follow. Read both paragraphs. Nell entered a community hall where three different neighborhood maps were posted above one check-in table. Boxes of blank signs sat beside electronic poll books. [Revision point] Trainers asked workers to practice directing mock voters from former polling sites to the correct stations. The building's usual room dividers had been rearranged into wider aisles. Which sentence best sets up the scene by explaining why election workers are practicing with several neighborhood maps in one hall?