Beneath the surface of the ground.
MAY BE
I would say either B or D but I think the better answer would be D.
Answer:
As labor is divided amongst workers, workers are able to focus on a few or even one task. The more they focus on one task, the more efficient they become at this task, which means that less time and less money is involved in producing a good.
Explanation:
Hope this helps
The surprise attack at Inchon<span />
