Questions 1 to 3 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now, listen to the conversation. The man’s professor has reserved this book so that______.
A．no one can borrow this book except him B．he can read it at any time he likes C．those who don’t have his permission will not be able to read it D．all the students have the opportunity to read it