IN-N-OUT BURGER \({ }^{\circledR}\) is considering building a franchise in a particular city. It will use a survey to determine the extent of interest among residents of the city. Which of the following procedures would be most appropriate for obtaining a statistically unbiased sample?

A. Survey a random selection of people whose names are obtained from national sales records of IN-N-OUT BURGER customers.
B. Survey a selection of people who are listed on the residential roll sheets of the city.
C. Survey a selection of people whose names are randomly chosen from the telephone directory of the target city.
D. Survey a random selection of customers coming out of other IN-N-OUT BURGER locations in the city.