13. A Statistics teacher decides to give A's only to students who score in the top 15% on the final exam. The scores are normally distributed with a mean of 78 and a standard deviation of 7 (this is also the population standard deviation). To the nearest integer value, what is the lowest score a student could earn and still receive an A? A. 79 B. 80 C. 82 D. 83 E. 85