The Columbian Exchange Was

The Columbian Exchange was:

A) the agreement that documented what Christopher Columbus would give to Spanish leaders in return for their sponsorship of his travel to the New World.
B) the transatlantic flow of plants, animals, and germs that began after Christopher Columbus reached the New World.
C) John Cabot's exploration of the New World, which brought more of the goods that Columbus had found back to the Old World.
D) responsible for introducing corn, tomatoes, and potatoes to the Americas.