A and B together take 6 days to complete a task. B and C together take 12 days to complete the same task. A and C together take 8 days to complete it. If A, B and C are working together, how long does it take for them to complete the task?

A. 5(1/3) days

B. 1(1/3) days

C. 4(2/3) days

D. 4 days

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