Task: Question Answering
Input (English): Question: A is 20% more efficient than B .how much time they will working together take to complete a job which A alone could have done in 15 days?

 Option A: 5 6/11 days

 Option B: 8 2/11 days

 Option C: 6 4/8 days

 Option D: 4 days

 Option E: 17 days
Output (English): Option B