Weegy: During the last Ice Age, the earliest inhabitants came to North America from Asia, by crossing a land bridge that previously existed in what is now the Bering Strait. User: What was the purpose of NAFTA? A. to establish economic ties between the United States, Canada, and Mexico B. to secure an end to increased pollution in North America C. to fight increasing concerns of terrorist activity in the United States, Canada, and Mexico D. to prevent another Great Depression (More)