Final answer:
Prince Henry of Portugal started a school of navigation, Marco Polo wrote a book about his travels, Portugal discovered an all-water route around Africa, Venice and Genoa gained a trade monopoly, King Ferdinand and Queen Isabella were the rulers of Spain.
Step-by-step explanation:
(16) Prince Henry of Portugal started a school of navigation to train Portuguese sailors in the 15th century.
(17) Marco Polo wrote a book about his travels to China and India called 'The Travels of Marco Polo'.
(18) Portugal discovered an all-water route around Africa to Asia.
(19) Merchants from the cities of Venice and Genoa gained a monopoly over trade with the East.
(20) King Ferdinand and Queen Isabella were the rulers of Spain during the time of Christopher Columbus.
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