Final answer:
The statement that meat-eating is the primitive condition for all non-dinosaurian archosaurs is false. Various archosaurs had different dietary habits, and not all were carnivorous, as evidenced by the diverse evolutionary histories within the group.
Step-by-step explanation:
The direct answer to the question is B. False. Meat-eating is not the primitive condition for all non-dinosaurian archosaurs. Many archosaurs, which include modern crocodilians and birds as well as extinct groups like pterosaurs and non-avian dinosaurs, had diverse dietary habits. While it is true that birds evolved from meat-eating theropods, not all archosaurs were carnivorous. The existence of Archaeopteryx, which shows both reptilian and avian features, points to a complex evolutionary history within the Archosauria group.
Some non-dinosaurian archosaurs might have been herbivores, omnivores, or even insectivores. Therefore, stating that meat-eating is the primitive condition for all of them would be incorrect. Fossil evidence, such as the discovery of flying dinosaurs like Archaeopteryx and Xiaotingia, supports this evolutionary relationship between birds and meat-eating dinosaurs.