Explanation

If 8 workers can do a job in 6 hours, it means that the total work required to complete the job is 8 x 6 = 48 man-hours.

If 12 workers are assigned to do the same job, the total work required remains the same, but the number of workers has increased. To find the time it will take 12 workers to do the same job, we can divide the total work by the number of workers:

48 man-hours ÷ 12 workers = 4 hours

Therefore, the correct answer is: Four hours.