Once an old man went to see a doctor. The doctor looked him over carefully and said, "Medicine won’t help you. You must have a good rest. Go to bed early, drink milk, walk a lot and smoke one cigar a day. Go to the country place for a month." After a month the man came to the doctor again, "How are you" said the doctor, "I’m glad to see you again. You look much younger." "Oh! Doctor, I feel quite well now," said the man, "l had a good rest. I went to bed early, drank much milk and walked a lot. Your advice really helped me, but you told me to smoke one cigar a day almost killed me first. It’s no joke to start smoking at my age!\ Which of the following advice is NOT good for the old man
A．Go to bed early. B．Smoke one cigar a day. C．Go to the country place for a month.