Task: Question Answering
Input (English): Problem: a box contains 7 pairs of shoes ( 14 shoes in total ). if two shoes are selected at random, what it is the probability that they are matching shoes ?
Options: a. 1 / 190, b. 1 / 20, c. 1 / 19, d. 1 / 13, e. 1 / 9
Output (English): d