The correct option is A were nomadic, while the civilizations of Mexico and Central America were more stable.
In 1500, the civilizations of Mexico and Central America differed from the civilizations of the North American Plains Indians in that the Plains Indians were nomadic, while the civilizations of Mexico and Central America were more stable. Mexico civilization : In 1500s Mexico can be said to have produced five major civilizations: the Olmec, Maya, Teotihuacan, Toltec, and Aztec. Central America civilization : The ancient Maya Civilization occupied much of the central North American continent based on the gulf coast of what is now Mexico between 2500 B.C. and 1500 A.D.