Answer:
The correct answer is A. The Southern Colonies were especially active in shipping enslaved Africans to America.
Step-by-step explanation:
Slavery existed in the United States since the creation of the British Colonies in North America in the 1600s until 1865, when the Civil War ended and the 13th Amendment was passed by Congress.
Labor of slaves was widely used in the plantation economy of the South. In the first half of the 19th century, the national wealth of the United States was largely based on the exploitation of slave labor. Over the period from the 16th century to the 19th century, about 12 million Africans were imported into the countries of the Americas, of which about 645 thousand were imported into the territory of the modern USA.
As of 1860, out of the 12 million population of 15 US states where slavery persisted, 4 million were slaves. Of the 1.5 million families living in these states, more than 390 thousand families had slaves.