Task: Question Answering
Input (English): Question: A and B together can do a piece of work in 10 days. B alone can finish it in 20 days. In how many days can A alone finish the work ?

 Option A: 20 days

 Option B: 10 days

 Option C: 30 days

 Option D: 40 days

 Option E: 50 days
Output (English): Option A