Based on current fossil evidence, A) whales were likely fully aquatic before they evolved peg-like teeth or baleen. B) evolution of baleen forced whales to become fully aquatic. C) the teeth of extinct whales such as Dorudon were similar to those of extinct land mammals. D) whales were likely fully aquatic before they evolved peg-like teeth or baleen and the teeth of extinct whales such as Dorudon were similar to those of extinct land mammals. E) evolution of baleen forced whales to become fully aquatic and the teeth of extinct whales such as Dorudon were similar to those of extinct land mammals.