题目选项分析

From enlargements that are commonly found on the ulna bones of the forearms of Ice Age human skeletons, anthropologists have drawn the conclusion that the Ice Age humans represented by those skeletons frequently hunted by throwing spears. The bone enlargements, the anthropologists believe, resulted from the stresses of habitual throwing.

Which of the following, if true, would be the LEAST appropriate to use as support for the conclusion drawn by the anthropologists?

【选项】Cave paintings dating from approximately the same time period and located not far from where the skeletons were found show hunters carrying and throwing spears.