Which sample is representative of the population being studied?
A.
To learn the in-flight seat preferences of passengers, an airline polls all its business travelers.
B.
To learn how many Americans like action movies, a group of students survey people at a downtown movie theater.
C.
To learn which of two writers, Charles Dickens or Leo Tolstoy, is more popular among students of literature, Dean surveyed students in one college library.
D.
To learn how many students at her school spend more than $10 on books in a month, Mia speaks to every sixth student she meets in the school hallway.