A、The visiting economist has given several lectures. B、The guest lecturer’s opinion is different from Dr. Smith’s. C、Dr. Smith a

W: I hear your son has started a part-time job at the gas station?
M: Yes. He works from 4 to 9 on Fridays and 1 to 10 on Saturdays and Sundays.
Q: How many hours does the man’s son work every week?

M: The visiting economist is speaking tonight. But Dr. Smith doesn’t seem to think much of him.
W: That’s because Dr. Smith comes from an entirely different school of thought.
Q: What do we learn from the woman’s remark?