Hi, I'd sat that the correct answer is B. A cannot be correct, because the simple subject would be "dinosaurs", whereas the complete subject is "large and small dinosaurs", they don't match. C is a similar case - simple subject is "detectives", whereas the complete subject would be "detectives Homer Fry and Janine Small:. In D - simple subject is "crocodiles", whereas the complete subject is "crocodiles, quiet as logs". That leaves us with only one solution - "Cory" is both a simple and a complete subject.
Answer:
there are no words or meanings
Unlike the woman in the sedan who swung off the road in an effort not to hit the turtle, the driver of the light truck actually veered to hit it. So, he struck it on the verge of the shell, and it flipped and flew off the road, to safety. Frightened and motionless, the turtle kept lying on its back, and then it started an effort to roll over and go away.