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. <span />
First impressions are said to be lasting impressions, and indeed, it is remarkable how soon the New World "that was never before known to anyone" was viewed as a land of wealth, promise, and opportunity
The biggest factors would be food and water.
Answer:
Discovered in August 3rd, 1492!