If X and Y are both positive two-digit integers and share no digits, and X > Y, what is the smallest possible value of X - Y? Choose the correct choice from the following.
A) 0  B) 1  C) 2  D) 3  E) 9
Answer = 1 = 1   20 - 19 = 30-29 = 40-39 = 50-49= 
<gadget id="calculator">50-49</gadget>
<output>1</output>
1
<result>B</result>
If X and Y are both positive two-digit integers and share no digits, and X > Y, what is the smallest possible value of X - Y?