Which of the following was a result of the Columbian Exchange? A. The first English settlement was established at Jamestown, Virginia.
B. Native Americans were forcibly removed from their lands.
C. About 600,000 Africans were taken to work as slaves in America.
D. Foods, animals, plants, and diseases moved between the Eastern and Western
hemispheres.

The Columbian exchange, also known as the Columbian interchange, named after Christopher Columbus, was the widespread transfer of plants, animals, culture, human populations, technology, diseases, and ideas between the Americas, West Africa, and the Old World in the 15th and 16th centuries.

Explanation:

so D

it increased 6 percent and reached that in 1980

the anwser is a) to prevent military conflict