The mean finish time for a yearly amateur auto race was 187.43 minutes with a standard deviation of 0.387 minute. The winning car, driven by Alex, finished in 186.74 minutes. The previous year's race had a mean finishing time of 111.3 with a standard deviation of 0.135 minute. The winning car that year, driven by Beth, finished in 110.97 minutes. Find their respective z-scores. Who had the more convincing victory? . . . Alex had a finish time with a z-score of Beth had a finish time with a z-score of (Round to two decimal places as needed.) Which driver had a more convincing victory? O A. Beth had a more convincing victory because of a higher z-score. B. Alex a more convincing victory because of a lower z-score. O C. Beth had a more convincing victory because of a lower z-score. O D. Alex a more convincing victory because of a higher z-score