Which sentence from paragraph 4 makes an explicit statement without offering any implicit suggestions? A). With renewed hope that there was some truth to the legends, I looked for new research.

B). If it created stomach gases like birds, it might create enough to lift itself off the ground.

C). Biologists backed up these ideas with sketches and models based on known animals.

D). Not everyone agreed with these ideas, but many of the things we accept about dinosaurs and other extinct species started the same way.