Scientists use both direct and indirect evidence to determine the dietary preferences of dinosaurs. A. Observations of fossilized remains indicate that most dinosaurs preferred to eat plants rather than animals. B. Specific information about a dinosaur's diet can sometimes be obtained from the fossilized contents of its stomach. C. A better understanding of how different dinosaurs reproduced and developed has helped paleontologists determine actual food requirements at different stages of the life cycle. D. The shape of a dinosaur's teeth and the structure of its jaws indicate, as do the teeth and jaws of modern animals, the general kind of food the dinosaur ate. E. Fossils formed from dinosaur's bodily waste can provide clues to what dinosaurs consumed, but such fossils cannot be easily associated with specific dinosaurs. F. Generally speaking, dinosaurs that were herbivores had a more varied diet than did dinosaurs that were carnivores.