Latin America was the geographic area had the most population and economic activity during the colonial period. This area is rich in minerals and raw materials in which these were traded by other countries. This has also the most number of nations inside it.
That time period was known as the roaring 20s, america was at its best, but the depression started in 1930... so the late 20s economy would be good but starting to fail
In short, I believe Darwin's theory was controversial in the 1800s because it contradicted the biblical view of creation.
(Sorry for the shortness.)
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It's a leading question, as cross-Atlantic trips carrying slaves would be European of all kinds. Though vikings usually enslaved people from the Baltic area but had slaves (thralls, in Danish; "trælle") from just about everywhere.
The Dutch and Belgians were far nastier than most nords, as at some point the Spanish and the Germans. Not to mention the old empire of the queen.
i would say that it would be B