Answer:
B. He established contact between the Americas and the rest of the world
Explanation:
Christopher Columbus was a great Spanish explorer, being known mainly for having discovered the American continent and having declared these lands as submissive to the Spanish government. He was the first to establish contact between Europe and America, this being his greatest achievement, which brought him much prosperity. Colobus started a system called the colonial exchange, where he took American agricultural products to Europe, which improved all European food habits.