The city council of a small town needs to determine if the town's residents will support the building of a new library. the council decides to conduct a survey of a sample of the town's residents. which one of the following procedures would be most appropriate for obtaining a sample of the town's residents?
a) survey a random sample of persons within each neighborhood of the town.
b) survey every 14th person who enters the old library on a given day.
c) survey a random sample of librarians who live in the town.
d) survey 200 individuals who are randomly selected from a list of all people living in the state in which the town is located.