Task: Question Answering
Input (English): Problem: a car traveled 75 % of the way from town a to town b at an average speed of 50 miles per hour . the car travels at an average speed of s miles per hour for the remaining part of the trip . the average speed for the entire trip was 60 miles per hour . what is s ? 
Options: a ) 150 , b ) 200 , c ) 250 , d ) 300 , e ) 237.5
Output (English): a