In a study of 418 nonprofits nationwide, 84 indicated that turnover has been the biggest employment challenge at their organization. Complete parts (a) through (c) a. Construct a 95% confidence interval for the population proportion of nonprofits that indicate turnover as the biggest employment challenge at their organization. STS (Type integers or decimals Round to three decimal places as needed!) b. Interpret the interval constructed in part (a) Choose the correct answer below O A. With 5% confidence, the proportion of nonprofits that indicate turnover as the biggest employment challenge at their organization in the sample is in this interval