The correct answer is <u><em>placer mining</em></u>
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Answer:
Among the most lucrative goods transmitted in the Columbian Exchange were sugar, corn, and tea. Columbus himself is credited with bringing sugar to Hispaniola, setting up sugar cane plantations after Spanish miners had exhausted the gold stores there....
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Nation's credit. Fiat currency is a currency like the Dollar or Pound, where a government says it has value, it's not something that does actually have value like gold or silver. The value is determined based on the nation's credit.
The answer is B hope this helps .
The freedman's bureau distributing supplies