Questions 11 to 13are based an the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now listen to the passage. The man shocked at the scene the next morning ______
A．because the bird had finally understood his threat B．because the bird managed to escape from the chicken house C．because the bird had learned to scream back at him D．because the bird was living peacefully with the chickens