Task: Question Answering
Input (English): Question: A, Band C can do a piece of work in 11 days, 5 days and 55 days respectively, working alone. How soon can the work be done if A is assisted by Band C on alternate days?

 Option A: 5 days

 Option B: 8 days

 Option C: 9 days

 Option D: 10 days

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