Answer:
C. The trade routes for goods between North America and Europe.
Explanation:
The Colombian exchange refers to a large exchange of plants, animals, and even diseases between Europe and the Americas.
Europe sent to the Americas: cows, horses, chicken, wheat, smallpox, etc.
America sent to Europe: potatoes, tomatoes, tobacco, corn, etc.
These are just some of the goods that were a part of this exchange.