Task: Question Answering
Input (English): Problem: what is the probability of randomly selecting one of the shortest diagonals from all the diagonals of a regular decagon ( 10 - sided polygon ) ?
Options: a. 3 / 10, b. 2 / 5, c. 2 / 7, d. 10 / 21, e. 5 / 11
Output (English): c