The correct answer is A) People in both places were introduced to new crops and animals.
The Columbian Exchange has been cited as one of the most significant events in history of the world ecology, agriculture and culture. It was a huge exchange of plants, animals, foods and human population - including slaves. This communicated diseases and ideas between Eastern and Western hemispheres. The exchange of plants and animals transformed European and American way of life. Foods that never been seen before became a part of their diets and new regions opened up for crops.
