Task: Question Answering
Input (English): Question: A certain characteristic in a large population has a distribution that is symmetric about the mean m. 60 percent of the distribution lies within one standard deviation d of the mean. If the shelf’s average life is 7.2 years and the standard deviation is 2.8 years, what percent of the distribution has more than 10 years as a shelf’s average life?

 Option A: 10%

 Option B: 12%

 Option C: 14%

 Option D: 15%

 Option E: 17%
Output (English): Option D