Which of the Following Methods Would Result in a Representative

Which of the following methods would result in a representative sample for a research study designed to apply to the U.S.population?

A) Ask people who visit a website that is relevant to the topic being studied to complete a survey.
B) Randomly select names from the phone books in ten major cities.
C) On national television,air an advertisement that asks people to contact the researcher.
D) none of these

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