Which statement best captures the broader impact of the Columbian Exchange on global ecology and populations?

Which statement best captures the broader impact of the Columbian Exchange on global ecology and populations?

• A. It introduced crops and animals to various regions, and also diseases that reshaped populations and ecosystems.
• B. It involved only crops, with no other biological exchanges.
• C. It led to zero ecological or demographic changes.
• D. It primarily affected the Old World with minimal impact on the New World.

Answer: (D)