Task: Question Answering
Input (English): Question: A and B can do a piece of work in 10 days, B and C in 15 days, C and A in 12 days. How long will C take to do it?

 Option A: 70 days

 Option B: 55 days

 Option C: 24 days

 Option D: 40 days

 Option E: 11 days
Output (English): Option D