Which of the following contributed most significantly to the population trend in pre-columbian mexico described in the excerpt?
migration in pursuit of fertile lands
a. trade and settlement resulting from maize cultivation
b. low birth rates and high death tolls as a result of european diseases
c. internal conflict between groups causing political instability

The correct answer is A: Trade and settlement resulting from maize cultivation

Explanation:

Before Europeans arrived in Mexico, there were several well-settled tribes and small kingdoms in the region which were in constant conflict since generations.  

Trade and Settlement due to maize cultivation had taken place thousands of years ago and by the time Europeans reached this part of the world, they found a thriving civilization which was not nomadic.

As a major crop, maize was able to provide sufficient nutrition and helped in the development of a major population centers including Mexico City.

answer; depth;

answer; rapid growth in buyer demand and high buyer switching cost;