Which development caused a sharp decline in population levels in the americas beginning in the 15th century?
a. decline in agriculture caused by the commercial revolution
b. introduction of slavery through the triangular trade
c. diseases introduced by the columbian exchange
d. immigration to asia during the age of exploration

Diseases introduced by the Columbian Exchange caused a sharp decline in population levels in the Americas beginning in the 15th century. The correct option among all the options given in the question is option "C". The natives never faced the diseases that attacked them and so they did not have any cure for them. 

C is correct

Explanation:

South - suffered huge losses...

South - faced economic failures...

North -  developed the transcontinental railroad...

North - led Reconstruction..

Explanation:

: )