David obtained a raw score of 120 on a history exam where the class average was 116 and a SD of 8. He also obtained a raw score of 53 on a geography exam where the mean was 48 and the SD was 5. We can conclude that: a. He did better on the geography exam b. He did equally well on both exams c. He did better on the History exam d. We need to know what the range of scores was