A company claims that the mean monthly residential electricity consumption in a certain region is more than 880 kiloWatt-hours (KWh). You want to test this claim. You find that a random sample of 60 residential customers has a mean monthly consumption of 900 KWh. Assume the population standard deviation is 125 KWh. At a = 0.10, can you support the claim? Complete parts (a) through (e). O A. HO: H = 900 OB. Ho: H $ 900 Ha: H # 900 (claim) Ha: [ > 900 (claim) O C. Ho: H > 880 (claim) OD. Ho: HE 880 Ha: H $ 880 Ha: [ > 880 (claim) O E. Ho: H= 880 (claim) OF. Ho: H > 900 (claim) Ha: H # 880 Ha: H $ 900 b) Find the critical value(s) and identify the rejection region(s). Select the correct choice below and fill in the answer box within your choice. Use technology. (Round to two decimal places as needed.) O A. The critical value is. O B. The critical values are + Identify the rejection region(s). Select the correct choice below. O A. The rejection region is z 1.28. O C. The rejection regions are z 1.28. (c) Find the standardized test statistic. Use technology