Question：Which of the following is an example of cost leadership with a narrow focus in the food retail industry?
　　A. Fruit and vegetable market stall.
　　B. Harrods' food hall.
　　C. A low cost supermarket such as Lidl.
　　D. A supermarket chain selling a wide range of high quality products, such as Waitrose.
　　The correct answer is: Fruit and vegetable market stall.
　　解析：A supermarket chain selling high quality goods, such as Waitrose, is not a cost leader. Also, because it sells a wide variety of goods throughout the UK it has a broad focus not a narrow focus. A low cost supermarket such as Lidl may be the cost leader, but again it has a broad focus not a narrow focus.
　　Harrod's food hall has a narrow focus; but it is not a cost leader.
　　A fruit and vegetable market stall is the lowest cost producer and sells to a narrow geographical market.