One year Roger had the lowest ERA (earned-run average, mean number of runs yielded per nine innings pitched) of any male pitcher at his school, with an ERA of 3.37. Also, Karla had the lowest ERA of any female pitcher at the school with an ERA of 3.31. For the males, the mean ERA was 4 281 and the standard deviation was 0.627. For the females, the mean ERA was 4 076 and the standard deviation was 0.672. Find their respective z-scores. Which player had the better year relative to their peers, Roger or Karla? (Note: In general, the lower the ERA the better the pitcher) Roger had an ERA with a z-score of Karia had an ERA with a z-score of (Round to two decimal places as needed.) Which player had a better year in comparison with their peers? O A. Karla had a better year because of a lower z-score O B. Karla had a better year because of a higher z-score O C. Roger had a better year because of a higher z-score. O D. Roger had a better year because of a lower z-score