Why did spanish plantation owners in the west indies begin using enslaved africans instead of enslaved natives?
a).plantation owners could trade food and clothing for slaves.
b).european diseases had killed much of the native workforce.
c).plantation owners wanted to enslaved africans pay their debts.
d).africans would only sell enslaved people to plantation owners.

B).European diseases had killed much of the native workforce.

Explanation:

Historians and demographers often coincide in the fact that infectious diseases nonexistent in America, carried by the European colonizers, mainly smallpox, were the main factor of the collapse that affected the American Indian population, which had no defenses against them. We must take into account, in addition to the diseases carried by the first explorers, the expansion of the venereal diseases of the Caribbean, especially syphilis, as a cause of the collapse of the population, in addition to the death of indigenous people caused by wars between them. and the Spaniards and their auxiliaries, also indigenous. In addition, we have the variation suffered in the exploitation conditions of the natives by the new lords. Historians and demographers disagree about the degree to which they contributed to the demographic debacle, but there is consensus on the feedback of both groups of causes.

- "it was a failure that was an embarrassment for the kennedy administration."

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the speech revealed that eastern european countries were no threat to their neighbors, which led to the creation of the truman doctrine i think this might be correct.