Answer: D.) Conditions in north and south America before 1492
Explanation:
The term Pre-Columbian refers to all indigenous societies and culture present in America before Christopher Columbus’s voyage in 1492. By the time Columbus happened upon the Western Hemisphere, the hundreds of tribes living in North America may together have numbered over 10 million people. They had developed a diverse array of communities in which more than 400 languages were spoken. The Indian societies created extensive trading networks, which helped spread ideas and innovations.