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How were journeys for explorers like Vasco de Gama and Christopher Columbus possible in the late 1400s?

A. Support of the exploration by the English government
B. Trade connections made by the Sultan
C. Effects of the Atlantic slave trade
D. Development of new navigational technology

Respuesta :

Answer:

D

Explanation:

There were many new navigational technologies but by far the biggest is the improved boats, as they were the main way of transportation.  

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