Several Tyrannosaurus rex skeletons found in North America contain tooth marks that only a large carnivore could have...

nivensdc on March 14, 2020

Why not D?

Why is D wrong?

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SamA on March 15, 2020

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.

nivensdc on March 15, 2020

Thank you. It makes sense now.

Ravi on March 17, 2020

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