To gauge public opinion on a proposed local tax increase, a community newspaper printed a ballot coupon in its Sunday edition, inviting readers to clip it out, mark 'Support' or 'Oppose,' and mail it back. Of the thousands of coupons returned, 65% indicated 'Oppose.' Which of the following best explains why these results are unlikely to accurately represent the sentiments of all residents in the community?
The newspaper did not provide an online option for voting.
Only residents who read the newspaper and are motivated to mail back a coupon are included in the sample.
The sample size was too small to draw accurate conclusions.
The question should have offered more nuanced options than just 'Support' or 'Oppose.'
