Final answer:
The Ancestral Puebloans utilized irrigation to grow crops such as corn, beans, and squash and lived in a high-altitude environment. Their settlement and trade were facilitated by an extensive road system, not a river system, and they constructed sophisticated cliff dwellings in the harsh weather conditions.
Step-by-step explanation:
Of the statements regarding the Ancestral Puebloan civilization, the following are true: Using irrigation, the Ancestral Puebloans were able to grow corn, beans, and squash. This agricultural prowess is evidenced by their progression from hunter-gatherers to established farmers of the Mesoamerican triad around the Four Corners area. Their settlements, such as Mesa Verde, were constructed using local sandstone and showcased remarkable craft in the form of multi-storied buildings that accommodated many people and provided spaces for ample harvest storage. The Ancestral Puebloans also lived in a high-altitude environment with conditions that were at times austere, marked by wind erosion, and climatic challenges like drought.
While statement B suggests the existence of an expansive river system, the Ancestral Puebloans were actually connected by an extensive road system that facilitated trade and cultural exchange. Artifacts like macaw feathers and obsidian indicate the breadth of their trade networks. Despite the challenges of their environment, the Ancestral Puebloans were able to craft sophisticated dwellings in cliff overhangs, make use of innovative storage techniques, and create a network of roads that tied their civilization to a broader economy.