Final answer:
Christopher Columbus revealed the existence of two previously unknown continents to Europe, leading to increased European exploration and colonization of the Americas.
Step-by-step explanation:
The correct answer is option C: Christopher Columbus revealed the existence of two previously unknown continents to Europe. Columbus's discovery of the New World was important to exploration during his time because it opened up a new era of European exploration and colonization. His voyages led to increased European presence in the Americas and the eventual colonization of the continent.
This discovery had a major impact on European history, leading to the exploration and colonization of the Americas by countries such as Spain, Portugal, France, and England. It also initiated the Columbian Exchange, the widespread transfer of plants, animals, and diseases between the Americas and the Old World.
Learn more about Christopher Columbus's discovery of the New World and its importance to exploration