Which of the following statements proves that scientific knowledge changed due


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, which was not expected.
The length of the hadrosaur was shorter than previously thought.
The muscular structure of the hadrosaur was less developed than expected.


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