单项选择题
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.
According to Charles, people send messages via facsimile because(). A. it is cheaper and faster than ordinary marl.
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 abroad.