Amovie complex has eight different movie theaters. the manager if the complex wants to conduct a survey to determine which snacks to add to the menu. which represents the best sample the manager could use for the survey?

a. survey the first movie-goers leaving the movie complex
b. survey 100 randomly selected movie-goers that just watched a drama movie
c. survey 100 randomly selected movie-goers in the 10-year-old to 40-year-old age bracket
d. survey 100 randomly selected movie-goers from the entire complex