The characteristics of food poisoning are as follows: ① The onset incubation period is short, and it is sudden and explosive. ② The disease was related to food, with the same history of eating contaminated food, and the epidemic spread scope was consistent with the supply scope of contaminated food. After the supply of contaminated food stopped, the epidemic ended. ③ The clinical manifestations are basically similar, mainly gastrointestinal symptoms. ④ There is no direct infection between people. So choose item D.