Task: Question Answering
Input (English): Problem: two cars start at the same time from opposite ends of a highway that is 175 miles long. one car is riding at 25 mph and the second car is riding at 45 mph. how long after they begin will they meet ?
Options: a. 2, b. 2.5, c. 3, d. 3.5, e. 4
Output (English): b