CULTURE is the correct answer.
Culture is defined as the ideas, languages, customs, traditions, social behavior and arts of a particular group of people or society. Also, culture is our way of living, traditions, values and the things we believe in.
You didn't really provide the letter out of which we should be able to deduce the benefits. However, Crusaders would say that the benefit of the crusaders were that they regained the holy land and could also profit out of this either by looting and pillaging neighbouring muslim villages or because they thought they were closer to God this way.
The correct answer is D.
The creation of free trade zones is a trade policy that consist on opening the national markets to foreign agents and therefore on eliminating trade barriers with other countries. The possibility of free entry attracts foreign capital and leads to higher levels of investment. Those new projects started with foreign money will need workers to function, and therefore will end up increasing employment too.
Such approach is opposite to the establishment of protectionist measures, which consist on setting trade barriers (custom duties such as tarriffs, quotas, etc.), and that would lead to the results explained in options A, B and C. It tariffs are set the goverment would increase the income earned from charging customs duties and the tariffs would prevent the free entrance of foreign competition. If the entry of foreign products and services is blocked is very likely that the influence of foreign countries decreases in South Korea.
Answer: The option that best describes a plantation in the 180s is C. a family-owned agricultural estate, usually in the South. At the time, most of the farms and plantations were found in the South, because that land was always more agriculturally-inclined, whereas the North was more interested in technology than in nature. At the time, there weren't many companies or factories, but rather farms created in the South where slaves were brought to work.