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A

A. Pleo is the size of a week-old baby camarasaurus, a dinosaur ^B from the late Jurassic period. B. A camarasaurus’ naturally stocky legs are perfect for containing motors and gears. C. Chung and his colleagues studied camarasaurus fossils to create an accurate model for Pleo. D. The head contains an IR communication device, an object detector, a light sensor, a mouth object sensor, and a motor to control jaw, nose, and mouth movement.

C

D

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