Task: Question Answering
Input (English): Question: A AND B CAN DO A WORK IN 12 DAYS, B AND C IN 15 DAYS, C AND A IN 20 DAYS. IF A, B AND C WORK TOGETHER, THEY WILL COMPLETE THE WORK IN:

 Option A: 5 DAYS

 Option B: 7 5/6 DAYS

 Option C: 10 DAYS

 Option D: 15 2/3 DAYS

 Option E: NONE OF THESE
Output (English): Option C