Choose the correct answer below. A. If a confidence interval estimate of p 1p1minusp 2p2 does not include 0, we have evidence suggesting that p 1p1 and p 2p2 have different values. B. A confidence interval is used to estimate the difference between two population proportions. C. A confidence interval is used to test a claim about two population proportions. D. The confidence interval uses a standard deviation based on estimated values of the population proportio