What effect did the Columbian Exchange have on the Native American
population?
O
A. It decreased the population because Native Americans were not
immune to European diseases.
B. It increased the population because the introduction of cattle
provided Native Americans with an alternative food source.
C. It increased the population because the introduction of the gun
discouraged tribes from fighting against each other.
D. It decreased the population because many Native Americans
moved to Europe.

A. It decreased the population because Native Americans were not

immune to European diseases.

Explanation:

Among all the animals and plants, Europeans brought to Native Americans many terrible diseases. Native Americans were strong but they didn’t have an immune system resistant to European diseases.

Native people had no resistance to such diseases as measles, smallpox, mumps, whooping cough, influenza, chickenpox, and typhus. The main disease that had a great impact was smallpox. This disease decreased habitats in a meaningful way.