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9. MSNBC's morning show runs a call-in survey each morning. Recently the morning the show asked its viewers whether they felt President Trump was doing a good job or poor job managing the COVID19 crisis. 91% of those phoning in their responses answered \"poor job\" and a margin of error is reported as i5%. We may safely conclude (3 pts) a. At least 86% of Americans believe President Trump is doing a poor job managing the COVID19 crisis. b. very little other than the majority of those phoning in believe President Trump is doing a poor job managing the COVIDl9 crisis because it is a voluntary response sample. c. it is unlikely that if all Americans were asked their opinion, that the result would differ from that obtained in the poll because the television show is unbiased. d. there is strong evidence that the vast majority of Americans believe that President Trump is doing a poor job managing the COVID19 crisis because a margin of error is reported