Answer:
[A] He started a school for sailors in Portugal.
Step-by-step explanation:
The prince of Portugal, preferably known as Infante D. Henry, was not only a prince, but also the patron of Portuguese explorers. Prince Henry has sent numerous trips to the west coast of Africa, which should create maps of the area needed to defeat Muslims, facilitate the spread of Christianity, and establish maritime trade routes. Portuguese ships were able to sail to Madeira and were the first to sail to the Gambia River because of their sponsorship. Portugal's influence in the Great Age of Discovery was also attributed to him.
He is known as Prince Henry the Navigator; for he was a monarch who had many interests in navigation. This interest has accompanied him since his youth and influenced him to start a school for sailors in Portugal.