Final answer:
The carnivorous dinosaurs that ran on two legs are known as Theropods. These include well-known species like Tyrannosaurus rex and Velociraptor, and are part of the evolutionary line that led to modern birds. Therefore, the most appropriate correct option is C.
Step-by-step explanation:
The correct answer to the question "___ are carnivorous dinosaurs that run on two legs" is c. Theropods. Theropods were a clade of dinosaurs that walked on two legs and primarily ate meat. Examples of theropods include the famous Tyrannosaurus rex and Velociraptor. Theropods are part of the larger group Saurischia, also known as "lizard-hipped" dinosaurs, which includes another subdivision, the long-necked herbivorous dinosaurs like Apatosaurus. Importantly, it is within the theropods that the ancestry of modern birds is found, showcasing the evolutionary transition from dinosaur to bird. In contrast, Therapsids were ancient relatives of mammals, and while they had several mammalian characteristics, they were not dinosaurs.