Task: Question Answering
Input (English): Question: A, B and C, each working alone can complete a job in 6, 8 and 12 days respectively. If all three of them work together to complete a job and earn $ 2340, what will be B's share of the earnings?

 Option A: $1100

 Option B: $520

 Option C: $780

 Option D: $1170

 Option E: $630
Output (English): Option C