Two statistics students at UCLA conducted an energy efficiency survey of graduate student apartments.There were seven university apartment buildings, and the students randomly selected three to be includedin the study. In each building, they randomly chose 25 apartments. What is the largest group of studentsthat the study results represent?XO All UCLA graduate student apartments.O All UCLA graduate student apartments in this group of seven buildings.O All UCLA graduate student apartments in the three sampled buildings.All UCLA graduate student apartments that were sampled in the three buildings.