Which of the following is NOT true of confidence interval estimates of the difference between two population proportions? . . . Choose the correct answer below. O A. A confidence interval is used to test a claim about two population proportions. O B. A confidence interval is used to estimate the difference between two population proportions. O C. The confidence interval uses a standard deviation based on estimated values of the population proportions. O D. If a confidence interval estimate of p, - P2 does not include 0, we have evidence suggesting that p, and p2 have different values