Task: Question Answering
Input (English): Problem: two dogsled teams raced across a 300 - mile course in wyoming . team a finished the course in 3 fewer hours than did team b . if team a ’ s average speed was 5 miles per hour greater than that of team b , what was team b ’ s average speed , in miles per hour ? 
Options: a ) 12 , b ) 15 , c ) 18 , d ) 20 , e ) 25
Output (English): d