TOEFL Reading: ETS-TOEFL阅读机经 - 3R6VRY3ZUCV3Z55NL$

In paragraph 3, why does the author mention that baby archosaurs ground their teeth inside the egg? A. To support the claim that baby dinosaurs in the egg shared certain behaviors with human babies before birth B. To contrast the behavior of baby archosaurs with that of other types of dinosaurs C. To cast doubt on the claim that adult dinosaurs fed their hatchlings in the nest D. To explain why the teeth of baby archosaurs were more worn than those of other juveniles