F: Did you ever take history 231? ,M: Yeah, last semester. ,F: I took the course this semester. What do you think about the professor? ,M: He's a terrible instructor and demands a lot, but fortunately, he's an easy grader.
(A) F: You are right. He is smart and fun. He never demands much. (B) F: I am afraid I did not quite catch what you were saying. Please repeat it. (C) F: Yes. He is easy-going and never demands much but boring. (D) F: Yes. The biology professor is demanding but a easy grader.
B