Task: Question Answering
Input (English): Question: Which is a better investment 9% stock at 580 or 6 2/5 stock at 312?

 Option A: 9% stock at 580

 Option B: Both are equally good

 Option C: 6 2/5 stock at 312

 Option D: None

 Option E: Cannot be compared, as the total amount of investment is not given
Output (English): Option C