The Development of Population Density and Overall Cultural Elaboration in the Southwestern

The development of population density and overall cultural elaboration in the southwestern United States occurred as a result of:

A) the diffusion of maize agriculture migrating northward from Mexico
B) the development of an intensive system of agriculture based on local plant crops and irrigation
C) the introduction of intensive agriculture from the eastern Woodlands
D) the development of complex trade networks throughout the region
E) the distribution of Post-Uto-Aztecan language speakers.