Mr. Smith moved to New York, and he needed a new doctor, so he went to see one. He sat down in the whiting- room and looked around. The doctor’s degrees were on the wall. Suddenly Mr. Smith remembered that there had been a classmate with’ the same name in his class at school,and he had become a doctor. As he went into the doctor’s, he remembered a young, handsome student, and was sad to see how old and heavy and grey this man looked. He said to him," Good morning, doctor. Did you go to King High School" The doctor answered," Yes, l did." "Were you there from 1942 to 19467" Mr. Smith asked. "Yes,I was,"the doctor answered. "How did you know" Mr. Smith laughed and said ,"You were in my class." "Oh" the doctor said and looked at him carefully for a few moments. "What were you teaching\ The doctor asked Mr. Smith" What were you teaching" because he thought Mr. Smith was ______.
A. younger than him B. older than him C. as old as him