Task: Question Answering
Input (English): Problem: the average speed of a car decreased by 3 miles per hour every successive 8 - minutes interval . if the car traveled 3.6 miles in the fifth 8 - minute interval , what was the average speed of the car , in miles per hour , in the first 8 minute interval ? 
Options: a ) 31 , b ) 35 , c ) 39 , d ) 43 , e ) 47
Output (English): c