Answer: C. Jade and obsidian were traded by the Mayan through an extensive network.
Explanation: This was because jade and obsidian were highly valued by the Mayans and were used for various purposes. Jade was used to make intricate jewelry and other decorative items, while obsidian was used to make sharp blades and tools. The Mayans developed an extensive trading network that allowed them to exchange goods with neighboring communities. This trading network allowed the Mayans to obtain valuable resources that were not available in their local region. They traded jade and obsidian for other items such as cacao, feathers, and textiles.