A research center claims that at least 31% of adults in a certain country think that their taxes will be audited. In a random sample of 600 adults in that country in a recent year, 28% say they are concerned that their taxes V will be audited. At a = 0.10, is there enough evidence to reject the center's claim? Complete parts (a) through (e) below. (b) Find the critical value(s) and identify the rejection region(s). Identify the critical value(s) for this test Zo = (Round to two decimal places as needed. Use a comma to separate answers as needed.) Identify the rejection region(s). Select the correct choice below and fill in the answer box(es) to complete your choice (Round to two decimal places as needed.) O A. The rejection region is O C. The rejection regions are z D. The rejection region is z