All dinosaurs "stand" on the ground with their legs standing upright, which is different from cold-blooded reptiles lying on the ground with limbs; the bone tissue structure of dinosaurs is similar to that of warm-blooded mammals; the lungs of dinosaurs Structure and warm-blooded animals are very similar; in modern ecosystems (such as the African steppe), the ratio between warm-blooded predators (such as lions) and predators (such as antelopes) is a constant value for North American dinosaur animals Group statistics show that the ratio between predators and predators is similar to this constant. These all indicate that dinosaurs are not cold, cold-blooded animals with slow movements, but warm-blooded animals with high metabolic rate and fast action. If one of the following is true, the above reasoning cannot be refuted most? ['Some sea turtles have a similar tissue structure to mammals, but they are cold-blooded animals.', 'Marine mammals such as cetaceans are not upright, but warm-blooded.', 'Statistics on the predator and prey ratios of North American dinosaur fauna are arbitrary.', 'The main difference in the physiological structure of cold-blooded animals and warm-blooded animals lies in the structure of the heart rather than the structure of the lungs.']