The test statistic of z=−1.91 is obtained when testing the claim that p=1/2. a. Using a significance level of α=0.10, find the critical value(s). b. Should we reject H0​ or should we fail to reject H0​ ? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. a. The critical value(s) is/are z= (Round to two decimal places as needed. Use a comma to separate answers as needed.) b. Choose the correct conclusion below. A. Reject H0​. There is sufficient evidence to warrant rejection of the claim that p=1/2. B. Fail to reject H0​. There is sufficient evidence to warrant rejection of the claim that p=1/2. C. Fail to reject H0​. There is not sufficient evidence to warrant rejection of the claim that p=1/2. D. Reject Hn​. There is not sufficient evidence to warrant rejection of the claim that p=1/2.