Upper Paleolithic cave paintings in Western Europe are among humanity's earliest artistic efforts. A. Researchers have proposed several different explanations for the fact that animals were the most common subjects in the cave paintings. B. The art of the cultural period that followed the Upper Paleolithic ceased to portray large game animals and focused instead on the kinds of animals that people of that period preferred to hunt. C. Some researchers believe that the paintings found in France provide more explicit evidence of their symbolic significance than those found in Spain, southern Africa, and Australia. D. The cave paintings focus on portraying animals without also depicting the natural environments in which these animals are typically found. E. Some researchers have argued that the cave paintings mostly portrayed large animals that provided Upper Paleolithic people with meat and materials. F. Besides cave paintings, Upper Paleolithic people produced several other kinds of artwork, one of which has been thought to provide evidence of complex thought.