Based on the information regarding prehistoric paintings, particularly those from the Lascaux Caves and other similar sites, the true facts about the artwork described (the painting of crossed bulls) are:
- Perspective and depth in this painting was not seen in art again until the 15th century
- Painting is from the Lascaux Caves
- Crossed legs show deliberate technique of perspective and depth
The other options regarding the domestication of animals and the sacrifice of animals are not accurately represented in the context of Prehistoric art's purpose and themes, and the mention of Altamira pertains to a different location in Spain, not Lascaux in France.