The data to the right show the average retirement ages for a random sample of workers in Country A and a random sample of workers in Country B. Complete parts a and b. Country A Country B Sample mean 64.1 years 66.5 years Sample size 30 30 Population standard deviation 4.5 years 5.5 years a. Perform a hypothesis test using a = 0.10 to determine if the average retirement age in Country B is higher than it is in Country A. Let population 1 be the workers in Country A and population 2 be the workers in Country B. Identify the null and alternative hypotheses. Choose the correct answer below. OA. Ho: H1 - H2 20 OB. Ho: H1 - H2 50 H1: H1 - H2 0 O C. Ho: H1 - H2 > 0 OD. HO: H1 - H2 # 0 H1: H1 - H2 50 H 1 : 141 - H2 = 0 OE. Ho: H1 - H2 = 0 OF. HO: H1 - H2