Answer: I think Carolina
Explanation:
Because Until the early 18th century, enslaved Africans were difficult to acquire in the colonies that became the United States, as most were sold to the West Indies, where the large plantations and high mortality rates required continued importation of slaves. One of the first major centers of African slavery in the English North American colonies occurred with the founding of Charles Town and the Province of Carolina in 1670.
After the explosion of the USS Maine, the US public was whipped up into an anti-Spanish hysteria. Despite Spain's desire to avoid war and President William McKinley's distaste for war, the yellow press continued feeding the public's appetite for anti-Spanish news. Hawks like then-Assistant Secretary of the Navy Theodore Roosevelt loudly criticized the reluctant McKinley for being weak and afraid.
D is the correct answer. Hope I could help.
German used submarines, called U-boats
