单项选择题

Questions 28 to 30 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions. Now, listen to the news.
From the report, we learn that______.

A.J.D. Salinger is a historian
B.J.D. Salinger wrote "The Catcher in the Rye"
C.J.
D.Salinger wrote "A People’s History of the United States"D.J.D. Salinger was Professor Emeritus at Boston University