A recent study posed the question about whether Japanese managers are more motivated than American managers. A randomly selected sample of each was administered the Sarnoff Survey of Attitudes Toward Life (SSATL), which measures motivation for upward mobility. The SSATL scores are summarized below. American Japanese Sample Size 211 100 Mean SSATL Score 65.75 79.83 Population Std. Dev 11.07 6.41 Judging from the way the data were collected, which test would likely be most appropriate? . . . . . O A. Pooled-variance t-test for the difference in means O B. Related samples t-test for mean difference O C. Related samples z-test for mean difference O D. Independent samples z-test for the difference in means