The radio station KICK is experimenting with a new format: reruns of the 1950's show Queen for a Day (in this show, contestants would tell sob stories, and the one elected the saddest by the audience applause-meter would get lots of prizes). KICK hires a polling organization to find out what listeners think of the station's makeover. The company, Poll Tracks, builds a telephone survey list by selecting pages at random from the telephone book, and then interviewing every person on each of the selected pages. This is an example of which of the following sampling techniques?

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