Task: Question Answering
Input (English): Problem: a ladder 30 feet long is leaning against a wall that is perpendicular to level ground. the bottom of the ladder is 10 feet from the base of the wall. if the top of the ladder slips down 5 feet, how many feet will the bottom of the ladder slip ?
Options: a. 14, b. 15, c. 18.92, d. 19, e. 25
Output (English): c