Which of the following scenarios best illustrates a truly random sample? A researcher ____________?

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gives a naira to every fifth female who walks into a commercial buildingsurveys the opinions of city residents by selecting every twentieth entry from the local phone directoryanalyzes the views of Democratic voters by picking every tenth individual from a city’s registered Democrats listNone of the above

Explanation

Options A, B, and C describe systematic sampling methods rather than random sampling. Systematic sampling involves selecting subjects at regular intervals, which does not guarantee each member of the population an equal chance of selection. Therefore, none of these examples represent a truly random sample.