Vasco de Game was the FIRST to reach india by sea, so he was indeed an explorer.
Henry the Navigator (no offense to him) was a joke. His title if fooling everyone, as he himself never even sailed once, he always sent others to do it for him (as he was a prince) This is your answer.
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Bartholomeu Dias sailed around the southernmost tip of africa in 1488, so he was an explorer too.
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Your answer is Henry
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One advantage of a centrally planned economy is that it tries to meet explicitly stated goals (D).
A centrally planned economy is one run by the government. In a centrally planned economy prices are kept under control so that everyone can afford goods and services. Since the government aims to provide employment to everyone, it also means that there is lower unemployment than in other types of economies.