Answer:
C. The Caddo lived in dome-shaped huts built from timber
Step-by-step explanation:
Their Dome-Shaped huts were made from Grass, not Timber.
They supported the dome using long wooden poles as the foundation and covered with dry grass to serve as its Roof and walls. During winter, they often covered the foundation with thick layer of clay to provide protection from the cold weather.
Typically, each of their dome-shaped huts were large enough for 20-30 people to live in. But one hut is usually used by no more than two-three families.