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

The answer is obviously C. Millions of American Indians died of disease.

d) the constitution rights of native americans and their right to self-government on reservations

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.