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The source  also does not use the word develope. The source does say: ""The evidence for the Big Bang comes from many pieces of observational data that are consistent with the Big Bang."" and ""... many observations support the Big Bang ..."" (over alternatives). I dont quite see how, you manage to summarize that to: ""evidence has led to further development of the model"". I have replace the sentence with something that actually matches the source (using the word ""support"").R "