仔细阅读理解 — 英语阅读题

Read the following passage and answer the question. Many students find it hard to stay focused while studying online. To solve this problem, some universities have started 'focus rooms' on campus. In these rooms, students must hand in their phones before entering and keep silent during their study time. A recent survey at Greenfield University showed that students using focus rooms completed their assignments 30% faster than those studying in dormitories. However, some students still prefer dormitories because they can take breaks freely and feel more relaxed. The university plans to open more focus rooms next term based on this positive result. Question: Why do some students still prefer studying in dormitories? A. They can use their phones freely in dormitories. B. They feel more relaxed and can take breaks freely there. C. Focus rooms are too far from their dormitories. D. The survey showed dormitories help them study faster.