Task: Question Answering
Input (English): Problem: a cyclist bikes x distance at 8 miles per hour and returns over the same path at 812 miles per hour . what is the cyclist ' s average rate for the round trip in miles per hour ? 
Options: a ) 8.1 , b ) 8.3 , c ) 8.6 , d ) 9.6 , e ) 9.0
Output (English): d