Acertain city divides naturally into ten district neighborhoods. how might a real estate appraiser select a sample of single-family homes that could be used as a basis for developing an equation to predict appraised value from characteristics such as age, size, number of bathrooms, distance to the nearest school, and so on?

(a) an appropriate method is to sample the most expensive homes in a randomly selected district.
(b) an appropriate method is to generate a simple random sample of all single-family homes in the city or a stratified random sample by taking a simple random sample from each of the ten district neighborhoods.
(c) an appropriate method is to randomly select which district to survey, and record data for each home in that district.
(d) an appropriate method is to sample the newest homes in all ten districts.