Task: Question Answering
Input (English): Problem: if x is the median of the set { 9 / 2, 11 / 3, x, 28 / 9, 21 / 5 }, x could be
Options: a. 16 / 5, b. 17 / 5, c. 4 / 7, d. 30 / 7, e. 4
Output (English): e