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Option: d. their extensive trade network.

Explanation:

The Jumanos found in the region of Rio Grande Valley and El Paso in West Texas. They were known for their extensive trade networks. They lived in a lifestyle of nomadic as they travelled throughout western Texas following buffalo. They relied on buffalo for their survival. Jumanos depended on the bison for their meat, and skin for the cloth and shelter to keep them warm. They also engage in farming crops like corn, squash, beans, and pumpkin.