Which scenario best illustrates a truly random sampling method? A researcher__________?

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gives a token to every fifth female visitor entering a corporate officesurveys the opinions of city inhabitants by selecting every twentieth entry from the local phone directoryinvestigates the views of Democratic voters by picking every tenth individual from a city roster of registered DemocratsNone of the listed options represent a random sample

Explanation

Options A, B, and C describe systematic sampling approaches rather than random sampling. None of these methods involve selecting individuals entirely by chance, so the correct choice is D, indicating that none of the provided examples are random samples.