Which of the following scenarios best explains the Columbian Exchange? Grain crops such as wheat, oats, and barley were introduced to Europe as a result of interaction with indigenous people in the Americas. Prior to this, the only significant grain crops grown by Europeans were rice and corn.

Grain crops such as wheat, oats, and barley were introduced to Europe as a result of interaction with indigenous people in the Americas. Prior to this, the only significant grain crops grown by Europeans were rice and corn.
A

Many new diseases were introduced to European colonizers when they began to explore the Americas. In particular, diseases like smallpox, influenza, and the measles decimated many of the early colonial populations.

Many new diseases were introduced to European colonizers when they began to explore the Americas. In particular, diseases like smallpox, influenza, and the measles decimated many of the early colonial populations.
B

Domesticated animals such as cattle, horses, pigs, and chickens were introduced to the Americas by European colonizers. Prior to this, very few animals had been domesticated in the Americas.

Domesticated animals such as cattle, horses, pigs, and chickens were introduced to the Americas by European colonizers. Prior to this, very few animals had been domesticated in the Americas.
C

Crops such as potatoes and tomatoes were introduced to the Americas. Prior to European contact, these crops had only been grown in Europe: potatoes primarily in northern Europe and tomatoes primarily in southern Europe.

Crops such as potatoes and tomatoes were introduced to the Americas. Prior to European contact, these crops had only been grown in Europe: potatoes primarily in northern Europe and tomatoes primarily in southern Europe.
D

Many crops that became valuable cash crops were introduced by European colonial powers to the Americas. Specific examples of these valuable plantation crops are tobacco, cacao, and pineapples.