Which of the following polling methods is most likely to produce a valid sample? Question 5 options: a) Polling people who visit cnn.com b) Polling people leaving a professional football game c) Polling

Which of the following polling methods is most likely to produce a valid sample?

Question 5 options:

a)

Polling people who visit cnn.com

b)

Polling people leaving a professional football game

c)

Polling people who watch a particular television show

d)

Polling people on their phones using random-digit dialing

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