Questions 7 to 10 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now, listen to the conversation. According to Charles, people send messages via facsimile because
A．it is cheaper and faster than ordinary mail. B．it is faster and not much more expensive than mail. C．it can send things that could not be expressed by telex. D．the Royal Mail could not reach places abroa