W: You look rather pale, Mr. Williams. Aren't you feeling well? M: It's nothing serious actually. I was sick most of the night. I didn't sleep very well. W: What seems to be the matter? Is it the flu? M: No, I think it's something I ate. We ate at that new restaurant last night, and I must have eaten something that didn't agree with me. W: Was it that new restaurant over on Fourth Street? Opened only two weeks ago? M: As a matter of fact, it was. Why do you ask? W: Because Jerry ate there last week and had the same kind of problem. He was sick the next day, too. M: That's interesting. Maybe the health authorities should look into the matter. W: That's what I think. Two people with similar problems in such a short time can't just be coincidence!, Question: When did the man begin to feel sick? (A) Yesterday afternoon. (B) Last night. (C) This morning.
(B) Last night.