Task: Question Answering
Input (English): Problem: a set s = { x, - 8, - 5, - 1, 1, 6, 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. can not be determined, c. 1, d. 0, e. 2
Output (English): e