In order to identify which student performed the best on a statistics exam among four different sections of the course, an instructor converted all student scores to z-scores. Based on the standard normal distribution, which student performed the best? a. The student with a z-score of -1.95. b. The student with a z-score of 1.5. c. The student with a z-score of 0.5. d. The student with a z-score of -0.1