Answer:
C. They believed that animals, plants, and forces of nature were filled with spirits.
D. They conducted burial rituals for their dead.
Step-by-step explanation:
Prehistoric people had their own differents systems of beliefs and practices, these are considered the origins of religion. As prehistory is the period before the creation of writting option E is wrong.
There is evidence that during the middle paleolithic period humans already realized burial rituals, this suggest that they believed in something else after death. This because of the placement and position of the corpses which seem to be to protect them.
The graphic art performed by them also suggest that they seem in nature something else than just food or resources. Totemism involved permanent relations with nature. Some paintings mix human and animal forms which means that they seem in them spirits and knowledge beyond their own understanding.