An advice columnist asks readers to write about their marriages. the results indicate that 79% of respondents would not marry the same partner if they could do it all over again. which of the following statements are true? a. it is likely that this percentage is higher than the true ppopulation proportion, since people who aren; t happy in their marriages are more likely to respond than those who are happy. b. it is likely that this result is an accurate reflection of the population. c. there is no way of predicting whether the results are biased or not. d. it is likely that the results are not accurate, since people tend to lie in voluntary response surveys. e. it is likely that this result is lower than the true population proportion since persons unhappy in thier marriages are unlikely to respond.