Final answer:
Archosaurs include modern crocodiles and alligators, extinct pterosaurs, various dinosaurs, and birds, which evolved from maniraptoran theropods. The correct groups included in the Archosaur clade are dinosaurs, pterosaurs, and crocodiles.
Step-by-step explanation:
The Archosaurs are a group that includes several species of diapsids that diverged during the Mesozoic era. Among the creatures that fall under the category of Archosaurs are modern crocodiles and alligators, the extinct pterosaurs (winged lizards), various species of dinosaurs (terrible lizards), and modern birds, which evolved from a branch of theropod dinosaurs. Specifically, birds evolved from the maniraptoran theropods, which are part of the saurischian (lizard-hipped) group of dinosaurs.
Turtles, while reptilian and diapsids, are separate from the Archosaur clade, as they belong to a different group known as Testudines. Similarly, snakes and lizards are part of the Squamata and do not fall under the classification of Archosaurs. B, which includes dinosaurs, pterosaurs, and crocodiles as members of the Archosaurs.