Answer:
All of them would be the correct answer.
Explanation:
The Columbian exchange had negative effects on Latin America and the Spanish people. They brought them corn and food to them, so that would be B first. Everyone was happy because the people brought them food and supplies to help them. So, that would make C it also. Lastly, with the supplies that they had they were able to go exploring the world and colonizing the new world. That would make an answer also. I hope I helped and have a wonderful day.