Set A of 8 positive integers may have the same element and have 37. And set B of 8 positive integers must have different elements and have 37. When m and n are the greatest possible differences between 37 and other elements’ sums in set A and set B, respectively, m-n=? Choices:
A) 21	B) 22	C) 23	D) 25	E) 26
This is maximum-minimum. Hence, 37-(1+1+1+1+1+1+1)=30 and   37-(1+2+3+4+5+6+7)= 
<gadget id="calculator">  37-(1+2+3+4+5+6+7)</gadget>
<output>9</output>
9. So, 30-9=21. The correct answer is 22.
<result>B</result>
Set A of 8 positive integers may have the same element and have 37. And set B of 8 positive integers must have different elements and have 37. When m and n are the greatest possible differences between 37 and other elements’ sums in set A and set B, respectively, m-n=?