Task: Question Answering
Input (English): Question: A pump can fill a tank with a water in 2 hours. Because of a leak, it took 2 and 4/5 hours to fill the tank. The leak can drain all the water of the full tank in how many hours?

 Option A: 4

 Option B: 5

 Option C: 6

 Option D: 7

 Option E: 8
Output (English): Option D