Task: Question Answering
Input (English): Problem: a set s = { x , - 8 , - 7 , - 6 , 6 , 8 , 9 , y } with elements arranged in increasing order . if the median and the mean of the set are the same , what is the value of | x | - | y | ? 
Options: a ) 1 , b ) 0 , c ) 2 , d ) - 1 , e ) can not be determined
Output (English): c