The mean finish time for a yearly amateur auto race was 187.46 minutes with a standard deviation of 0.377 minute. The winning car, driven by Chris, finished in 186.33 minutes. The previous year's race had a mean finishing time of 111.5 with a standard deviation of 0.118 minute. The winning car that year, driven by Rita, finished in 111.25 minutes. Find their respective z-scores. Who had the more convincing victory? Chris had a finish time with a z-score of Rita had a finish time with a z-score of . (Round to two decimal places as needed.) Which driver had a more convincing victory? OA. Rita a more convincing victory because of a lower z-score. B. Chris had a more convincing victory because of a lower z-score. C. Rita a more convincing victory because of a higher z-score. D. Chris had a more convincing victory because of a higher z-score.