41. What is Artificial Intelligence (AI) and what does it represent? (A) A complex computer program； the culmination of human ingenuity in computer science and cognitive psychology. (B) A simple system； the end of research and innovation in computer science and cognitive psychology. (C) A sophisticated technology； the beginning of research and innovation in computer science and cognitive psychology. (D) A basic tool； the end of human ingenuity in computer science and cognitive psychology. (E) A primitive concept； the beginning of human ingenuity in computer science and cognitive psychology.