In a public opinion poll, a polling company used an online survey tool to randomly contact respondents who did not have telephone lines in addition to contacting people over the phone. Which of the following best explains this decision?A. The company saved money because it did not need to hire as many telephone interviewers to conduct the poll.B. The company was establishing a benchmark poll at the beginning of a campaign.C. The company was interested in asking different questions to different individuals.D. The company wanted to ensure that the sample of the population was truly random.

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