Which of the following conclusions can be made by surveying a sample group of people in the same neighborhood?

A. The committee planning a party for the houses on one street should serve sweet iced tea instead of soda.
B. Students in eighth grade at the local middle school prefer R&B over country music.
C. Mama Mia Pizza is the best pizza place in the state.
D. Teenagers prefer to go to the mall rather than roller-skating.