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27. The Provo mayor has declared that all residents must wear a mask when out in public. After several weeks of enforced masks in public, she decides to ask residents on her website whether they believe that masks are still necessary. 83% of those who responded answered "no" and a margin of error is reported as +3%. We may safely conclude (1.5 pts) a. The vast majority of Provo residents no longer feel mask in public are necessary. b. very little other than 83% of those residents who replied no longer feel mask in public are necessary because it is a voluntary response sample. c. it is unlikely that if all residents were asked their opinion, that the result would differ greatly from 83%. d. there is strong evidence that the vast majority of residents no longer feel mask in public are necessary because a margin of error is reported