Please answer the following question: You are presented with the question "What are highly probable in the evolution of a group of bipedal dinosaurs?" and the following answer choices: - group activities - heat energy - lack of teeth - animals - high altitidues - mammals - fur and fat - feathers Now knowing that birds evolved from a group of bipedal dinosaurs called theropods and feathers are highly probable in the advanced bird-like theropods, choose the best answer.
A:
feathers