F: Do you know anything about Tim Berners Lee? ,M: Sure. He is a great scientist. He invented the software program known as the World Wide Web in one thousand nine hundred and eighty-nine. ,F: Can you tell me more about him? ,M: Of course. He was born in London, on June eighth one thousand nine hundred and fifty-five. He studied at Queen's College, Oxford University from one thousand nine hundred and seventy-three to one thousand nine hundred and seventy-six. ,F: Did he show an interest in computers when he was young? ,M: Yes. As a boy, he liked making toy computers out of old TV sets. ,F: That's interesting. Where did he work after he left college? ,M: He worked as a software engineer at CERN in Geneva, Switzerland in one thousand nine hundred and eighty. From one thousand nine hundred and eighty-one to one thousand nine hundred and eighty-four, he worked at John Paul's Image Computer Systems Limited in England. But he returned to CERN in one thousand nine hundred and eighty-four.
(A) F: Why he went back to work at CERN in Geneva in 1984? (B) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (C) F: In 1984, he also joined John Poole¡¯s Image Computer Systems, Ltd,didn't he? (D) F:  So he worked as a software manager at CERN in Geneva since 1980 to 1984.
A