Why not D?

Hello @nivensdc, The evidence presented to us is tooth marks on a T. Rex skeleton. We know these marks came from another T. Rex, because only a large carnivore could have made them, and the T. Rex was the only large carnivore. Then we are told that these marks were a result of combat or feeding. However, it is very unlikely that these marks could have been put on a live dinosaur. This eliminates combat as the cause, making feeding the only option. This is why C is the correct answer. D is incorrect because the possibility remains that T. Rex scavenged other dead T. Rex. It is possible that they ate each other, but never fought. Based on this evidence, we cannot conclude that they fought, nor can we conclude they didn't fight.

Thank you. It makes sense now.

@nivensdc, let us know if you have any other questions!