Task: Question Answering
Input (English): Problem: a rainstorm increased the amount of water stored in state j reservoirs from 130 billion gallons to 160 billion gallons . if the storm increased the amount of water in the reservoirs to 80 percent of total capacity , approximately how many billion gallons of water were the reservoirs short of total capacity prior to the storm ? 
Options: a ) 75 , b ) 70 , c ) 65 , d ) 85 , e ) 90
Output (English): b