Task: Question Answering
Input (English): Question: A and B complete a work in 4 days. A alone can do it in 6 days. If both together can do the work in how many days?

 Option A: 3.75 days

 Option B: 3.7 days

 Option C: 3.6 days

 Option D: 2.4 days

 Option E: 5.75 days
Output (English): Option D