Historians use art to help them understand what happened in previous time periods. How can looking at cave paintings from tens of thousands of years ago help historians understand events of the past?

A .The cave paintings have captions that tell what was happening to humans at the time.
B. The cave paintings provide maps to other historic sites nearby.
C. There were no animals at this time, so the cave paintings show specific human behaviors.
D. There was no written language at that time, so the cave paintings provide insight into how people lived.