Task: Question Answering
Input (English): Problem: oil is poured into a tank so that the tank is being filled at the rate of 4 cubic feet per hour . if the empty rectangular tank is 9 feet long , 8 feet wide , and 5 feet deep , approximately how many hours does it take to fill the tank ? 
Options: ['a ) 60', 'b ) 70', 'c ) 80', 'd ) 90', 'e ) 100']
Output (English): d