Answer: d. there was a decrease in the numbers of African slaves purchased due to fear of black population
growth.
Explanation: Plantation owners gradually replaced indentured servants with African slaves and became the primary labor forces, creating a cruel institution in the American colonies.
Answer:
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The Mongol invasions of Japan (元寇 Genkō), which took place in 1274 and 1281, were major military efforts undertaken by Kublai Khan to conquer the Japanese archipelago after the submission of Goryeo (Korea) to vassaldom. Ultimately a failure, the invasion attempts are of macro-historical importance because they set a limit on Mongol expansion and rank as nation-defining events in the history of Japan.
