Task: Question Answering
Input (English): Question: Pipe A can fill a tank in 9 hours. Due to a leak at the bottom, it takes 12 hours for the pipe A to fill the tank. In what time can the leak alone empty the full tank?

 Option A: 36

 Option B: 88

 Option C: 18

 Option D: 26

 Option E: 12
Output (English): Option A