Critical Reasoning (CR) | Re: Archaeologists have discovered various paintings on the

Archaeologists have discovered various paintings on the walls and ceiling of a Chinese cave whose entrance was blocked by a volcanic eruption in the 25th century B.C. and only recently cleared by an earthquake. Since the paintings depict warriors using Type C bronze weapons, these archaeologists have concluded that Type C bronze weapons were already widely
used in this area by 2500 B.C., far earlier than was previously believed.

Which of the following pieces of additional evidence would most