Task: Question Answering
Input (English): Question: Set A of 8 positive integers may have the same element and have 39. And set B of 8 positive integers must have different elements and have 39. When m and n are the greatest possible differences between 39 and other elements’ sums in set A and set B, respectively, m-n=?

 Option A: 20

 Option B: 23

 Option C: 21

 Option D: 25

 Option E: 26
Output (English): Option C