M: Good morning. Anything wrong? W: I've been suffering from a fever since yesterday. M: Do you have any other problems? Like a headache or cough? W: No, I don't. I think it's only a fever. M: Let me check... It's 39 degrees. I'll give you some medicine. W: Thank you, doctor. M: You'd better take two or three days' rest. W: Thanks. M: This medicine is for one day only. Take two pills as soon as you get home, and another two before going to bed. W: I see. Thank you., Question: How long is the medicine for? (A) One day. (B) Two days. (C) Three days.
(A) One day.