The correct answer is B) a network of regional cultures.
The trait that the present-day United States shares with pre-Columbian Native Americans is a network of regional cultures.
In the pre-Columbian United States, the time before of the discovery of the Americas and the arrival of the European colonizers to the North American region, there was a great diversity of Native American Indian tribes, different ethnicities, and different cultures.
Something similar happens today with the number of immigrants that live in the United States. Since those first years of the American colonies, immigration brought people from England, Ireland, France, the Netherlands, Germany, and Eastern Europe. Time passed and African American slaves arrived in North America. Then, immigration from Asia. In the 1940s, immigration from Mexico and Latinoamerica.
Today, large cities such as Los Angeles, Phoenix, New York, Chicago, Miami, and more, are inhabited by many different races and cultures that create the kind of diversity only seen in this part of the world.
