Task: Question Answering
Input (English): Problem: a certain car uses 12 gallons of gasoline in traveling 120 miles. in order for the car to travel the same distance using 10 gallons of gasoline, by how many miles per gallon must the car ’ s gas mileage be increased ?
Options: a. 2, b. 4, c. 6, d. 8, e. 10
Output (English): a