Task: Question Answering
Input (English): Question: A can do a half of certain work in 70 days and B one third of the same in 35 days. They together will do the whole work in.

 Option A: 77 days

 Option B: 55 days

 Option C: 44 days

 Option D: 60 days

 Option E: 33 days
Output (English): Option D