The mean finish time for a yearly amateur auto race was 186.13 minutes with a standard deviation of 0.396 minute. The winning car, driven by Frank, finished in 185.47 minutes. The previous year's race had a mean finishing time of 110.7 with a standard deviation of 0. 122 minute. The winning car that year, driven by Julie, finished in 110.33 minutes. Find their respective z-scores. Who had the more convincing victory? . . . . . Frank had a finish time with a z-score of Julie had a finish time with a z-score of (Round to two decimal places as needed.) A. Frank had a more convincing victory because of a higher z-score. B. Julie a more convincing victory because of a higher z-score. C. Frank had a more convincing victory, because of a lower z-score. D. Julie a more convincing victory because of a lower z-score