Depends what era you mean right now we're sort of at peace with them but we used to be in a war against them so it all depends on time.
Answer: the most reasonable one is B.
Explanation:
The two types of farm owning developed slavery because the owners of them were allowed to have slaves. The encomienda system was based on the idea that conquerors should have slaves to work for them, and it similarly applied to sugar colonies that had slaves on them. They were responsible for a lot of trafficking of slaves from Africa.