Which of the Following Statements About African Slavery in European

Which of the following statements about African slavery in European countries during the sixteenth century is MOST accurate?

A) Although all European nations allowed slavery in their American colonies,they prohibited it within the borders of their homelands.
B) By the end of the sixteenth century,African slaves had become a substantial portion of the agricultural labor force in continental Europe.
C) The large numbers of landless white laborers prevented African slavery from becoming a substantial segment of continental Europe's labor force.
D) Although a few African slaves lived and worked in Europe,there were never more than a few hundred of them in any given location.