How far do US workers travel to get to their jobs? A researcher would like to collect information on the commute distance traveled by workers and considers many methods for collecting data. Which of the following methods represents a voluntary response sample?

A voluntary response sample consists of people who choose for themselves whether to participate. In choice A, workers decide whether to visit the website and share their commute distance, so those who respond form a voluntary response sample. The other methods select or approach people directly rather than relying on people to volunteer.

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