Respuesta :
I think the correct answer is D. More efficient ships aided the explorers during the Age of Discovery. During this time, many tools were needed for explorers to travel across seas. Ships were the most helpful for them because they were able to go from one island to another isalnd with ease. Some of the ships were the Caravel, Galleon and the Dutch ships.
I believe the answer is: D.More efficient ships
More efficient ships allow the ships to travel in larger distance while using less resources. It also had enough size to contain a lot of sailors to operate the ships. This ships make many empire willing to invest in the explorer's team, which lead to many discoveries of the New World during the Age of Discovery