Respuesta :
It is C Disease killed millions of native americans.
The reason this answer is correct is becuase A B and D are all good effects, you are looking for a NEGATIVE effect. hope this helps!
Answer:
C. desease killed millions of native americans.
Explanation:
Remember that the columbian exchange refers to the initial interchange of plants, animals, and disease between Europe and America. It makes reference to Columbus and his arrival to the "New World". Of the options given, option C is the only one that presents negative results of this exchange. Native americans were exposed to diseases that were nonexistent in their region, as their inmune system was not prepared to face them, thousands of them died. Some of this diseases were chickenpox, measles, mumps, and smallpox.