The last members of a now-extinct species of a European wild deer called the giant deer lived in Ireland about 16, 000 years ago. Prehistoric cave paintings in France depict this animal as having a large hump on its back. Fossils of this animal, however, do not show any hump. Nevertheless, there is no reason to conclude that the cave paintings are ttherefore inaccurate in this regard, since __. Which of the following most logically completes the argument? ['only one currently existing species of deer has any anatomical feature that even remotely resembles a hump', 'animal humps are composed of fatty tissue, which does not fossilize', 'the cave paintings of the giant deer were painted well before 16, 000 years ago', 'some prehistoric cave paintings in France also depict other animals as having a hump']