Listening Quiz: Phân Tích Tự Xây Dựng hay Mua Sẵn Hệ Thống Mới – Easy Level

1. What is Olivia and William mainly discussing?
2. According to William, what is one advantage of buying a system?
3. What does Olivia say about building a system?
4. What can be inferred about the system the company needs?
5. What do Olivia and William decide to do next?

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