Event most influential factor motivating European Exploration, in following events.

a. Columbian Exchange

b. Establishment ignored the feudal system

c. Rise of nation-states

d. Declining capitalist investments

a. Columbian Exchange

Explanation:

The first Europeans that managed to get tot he New World discovered lot of things that can be used back in their homelands. Lot of new crops were discovered, animals, vast fertile lands, as well as gold and silver. Once these things were introduced back in Europe the word quickly spread out, so the interest for exploration skyrocketed. Lot of people wanted to get out of Europe and go into the New World in order to get to this things, start a new life, and get rich. This resulted in countless explorations and mass migrations toward the New World.

Option A is the correct answer.

Explanation:

Christopher Columbus was an Italian explorer; he was born around 1451 and died in 1506. He completed four trips to the Americas and he exchanged many things, meaning that he took resources from the Americas and carried them to Europe, and vice versa. This exchange was a key part for European Exploration because of the valuable things he brought in his trips. Due to this, option A is the answer.