b) Perform the appropriate test to determine if thec) Comment on how the confidence interval estimate supports the results of the hypothesis test. Choose the correct answer below. A. The interval contains the historical mean $670, which supports the decision to not reject the null hypothesis. B. The interval does not contain the historical mean $670, which supports the decision to reject the null hypothesis. C. The interval does not contain the historical mean $670, which supports the decision to not reject the null hypothesis. D. The interval contains the historical mean $670, which supports the decision to reject the null hypothesis. mean audit cost is now different from the historical mean of $630630. Use a . 01.01 level of significance. the null hypothesis that the mean audit cost is the historical mean of $630630. The data from the sample of client audit fees sufficient evidence that the mean audit cost is now different