In an experiment, a flashlight and a buzzer are each placed in a vacuum chamber connected to a vacuum pump. They are switched on, and the air is slowly removed from the chamber. A sensor placed outside of the vacuum chamber records the output of each device.

Which of the following statements proves that scientific knowledge changed due to the discovery of the fossil of a hadrosaur in north dakota? hadrosaurs were better runners than earlier thought. hadrosaurs had no pattern on their skin as expected. the length of the hadrosaur was shorter than previously thought. the muscular structure of hadrosaurs was less developed than expected.