Answer:
small population lead to lower oil production
D. the north opposed slavery before the civil war and the South didn't. In this situation d is the answer but note for future reference slavery issue was not the only cause for the civil war.
No John Quincy Adams was the son of John Adams
North Korea remained Communist and established collective farms, etc. They had serious economic problems very shortly afterward. South Korea prospered and saw the greatest economic growth rates in the world.
