Passage:

In the school library, a group of students proposed extending opening hours. At first, the head librarian refused, explaining that staffing the desk after 4 p.m. would cost money the school did not have. The students then suggested a volunteer rota, but the librarian rejected that plan too, citing safeguarding rules. The conversation stalled until one student asked a different question: which tasks actually required an adult librarian, and which tasks were routine? Once the group listed the routine tasks, the librarian realised that a supervised study hall could operate with a teacher on duty while the book desk remained closed. The final agreement was not an extension of all services, but a new schedule that offered a quiet study space later in the day. The students still described it as a “library win,” although it was really a redesign of what the library meant after school.

Which sentence best functions as the most coherent concluding sentence to add after the passage?