Task: Question Answering
Input (English): Problem: if henry were to add 9 gallons of water to a tank that is already 3 / 4 full of water , the tank would be 7 / 8 full . how many gallons of water would the tank hold if it were full ? 
Options: a ) 25 , b ) 40 , c ) 64 , d ) 72 , e ) 96
Output (English): d