34. Which of the following is NOT mentioned as a reason that makes Din Tai Fung successful? (A) Every xiao long bao is folded 18 times and weighs 21 grams. (B) Din Tai Fung has 180 stores in 13 countries all over the world. (C) Customers can see chefs preparing food in glass-walled kitchens. (D) Customer service and taste of food are the same in any branch store.