Answer:
D. Slave Trade
Explanation:
The Portuguese were the first Europeans to engage in Slave Trade, during the last decade of the Fifteenth century.
They used the stops they founded or used in West Africa to ship slaves from West Africa to their newly founded colony of Brazil.
They carried out this practice specially from the coasts of what is now Angola. Hundreds of thousands of Africans from Angola were shipped to Brazil during the following three centuries.
It would help the nation focus on pressing problems.
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The answer to the question is d
