What occurred during the columbian exchange?
a. people from africa were brought to europe.
b. millions of american indians died of disease.
c. horses and cattle went from africa to europe.
d. potatoes and tomatoes were introduced in the americas.

The correct answer is B. Millions of American Indians died during the Columbian Exchange, due to the fact that the food and animals that entered into America from Europe generated diseases because they did not have the necessary antibodies to consume them. For example, almost 30% of the American Indians died from smallpox a few years after the Europeans started to bring their products to the continent.

explanation:

damn girl thats not really your friend then. : /