13 0.43 Poir Suppose a 95% confidence interval for a population proportion is (0.21, 0.43). How would the width of the confidence interval change if the confidence level was changed? A Both a 99% confidence interval and a 90% confidence interval would be wider. B A 99% confidence interval would be wider and a 90% confidence interval would be narrower. C A 99% confidence interval would be narrower and a 90% confidence interval would be wider. D Both a 99% confidence interval and a 90% confidence interval would be narrower