It was the the Viking.
Actually, the first person known to have settled in Greenland was Erik the Red, from Norway, who first sailed to Iceland and then to Greenland.
The correct answer is to protect domestic businesses.
When the US government puts a tax on an imported good (aka a tariff) they are trying to protect American businesses. The US government, when it passes tariffs, believe that the increased price of foreign goods with result in citizens buying goods from American made companies, as they will be similar in price or cheaper. This strategy has been used by the United States since the early 1800's and continues to be used as a means of protecting American businesses.
However, the succeess of these types of tariffs are mixed, as this usually results in a decrease in trade and an overall increase in price for consumer goods.
The answer is B......................
