The passage presents specific details, and comparing them with the choices confirms that "夜遅くまで起きている人が増えた。" is the only accurate representation of the text. This is directly supported by the sentence "しかし、電気が発明されてから、夜遅くまで起きている人が多くなった". To solve info-retrieval or detail-oriented questions, scanning for keywords from the question and mapping them to the options is key. The other choices, such as "夜になるとすぐ寝る人が増えた。" and "朝早く起きる人が増えた。", introduce incorrect facts or make assumptions unsupported by the passage.