Task: Question Answering
Input (English): Problem: a pump can fill a tank with water in 2 hours . because of a leak , it took 2 2 / 3 hours to fill the tank . the leak can drain all the water of the tank in 
Options: a ) 6 hours , b ) 8 hours , c ) 9 hours , d ) 10 hours , e ) 12 hours
Output (English): b