Marcel, the Owner and President of a Three-Star Hotel, Believes

Marcel, the owner and president of a three-star hotel, believes that only competitors within the same strategic group need to be analyzed. Nina, the chief of client services, believes that other groups must also be considered in order to stay ahead of competition. Which of the following situations strengthens Nina's argument?

A) A new café on the same lane as Marcel's hotel is being frequented by business people.
B) A grocery store close to Marcel's hotel has all the ingredients required for her restaurant.
C) The customers of Marcel's hotel are class conscious and do not prefer routine services available elsewhere.
D) The hotel owned by Marcel enjoys monopoly as it is located in a suburb with few similar service providers.